Work Of Ideologies In A Media Text And Its Impact On Readers Free Essay Example, 2500 words

Some idea will have an advantage over others because they are always built in a familiar media image or are known to be very popular. Other ideas will not be easy to identifying as they are not that visible and will only be identified by those people who are very devoted. The way in which media use the lifestyle magazine to advertise (Okonkwo Palgrave 2007) or inform the public about certain issues provides the form of the principle of public dialogue by which the conflict of culture is waged. Media is not only a place where advertisement competition is carried out but also a cultural warfare battleground. Much of the current warfare experienced today is the acceptability of the idea being broadcasted by the mass media. The experienced struggle over values and morality are mainly determined by the implication of the lesions and images the popular media teach about the society. When the album of Eminem of The Marshall Mathers LP was selected as the year 2001 album (Ford, 2004), cont roversy came up over the musician s violent and angry lyrics and his say on gays, women, and lesbians. We will write a custom essay sample on Work Of Ideologies In A Media Text And Its Impact On Readers or any topic specifically for you Only $17.96 $11.86/page The main reason why the images of media become so hot is that they are strongly believed to endorse objectionable ideas. Clearly, it can be stipulated that a few people are majorly concerned with media text that has or shares the same opinion as theirs. The ideological analysis, therefore, goes hand in hand with political support, as critics use the identification of a message that has been distorted to make their own point of ideology (Grossberg, 2005).

Legalizing Drugs - 754 Words

Legalizing illicit drugs Legalizing drugs? Sounds crazy, but this has been an endless war in the world. It has created overcrowding in prison, violent drug wars and thousands of dollars is spent on it every year just to control something that’s unstoppable. This paper argues that legalizing drugs would not only save money, but get rid of overcrowding in prisons and put an end to a drug war. By legalizing illicit drugs we’re basically unclogging the court system CanadianHarmreducation.com (2003) research found that â€Å" as a result, courts have become clogged with addicted people; in Canada over 50 000 people were charged with drug offences in 1999 and an estimated 400 000 court appearances were related to illicit drug use.† because it†¦show more content†¦Ã¢â‚¬Å"The latest United Nations Drug Control Program (UNDCP) results in their World Drug Report estimate that the extent of drug abuse in the world involves about 180 million people† (â€Å"Drug Use and Offending, 2015) that means about 180 million people in the world use illicit drugs and even with imprisonment there will never be a lasting fix. According to the Substance Abuse and Mental Health Services Administration’s â€Å"National Survey on Drug Use and Health, 23.5 million persons aged 12 or older needed treatment for an illicit drug or alcohol abuse problem in 2009. Of these, only 2.6 million of those who needed treatment—received it at a specialty facility.† This could be a direct result of different reasons, conceivably the absence of cash to pay for treatment or the inaccessibility of the treatment itself. Authorizing all drugs and afterward offering free treatment could help take care of various issues of the drug war. The most reasonable approach to end the drug war is to authorize all drugs and get rid of the disciplines, it has been demonstrated to work. In 2001 Portugal turned into the primary European nation to abrogate every one of the punishments for the ownership of drugs rather than imprisonment treatment was offered as an option. According to the Washington post (2015) â€Å"the prevalence ofShow MoreRelatedEssay on Legalizing Drugs1373 Words   |  6 PagesDrugs- something and often an illegal substance that causes addiction, habituation, or a marked change in consciousness. - Merriam-Webster Dictionary Just close your eyes for a minute and picture what the world would be like if drugs were legal. Would you be for it or against it? Just think, you could get drugs anywhere you wanted. You would not have to worry about getting in trouble with the law. You could get as many as you wanted and have a supply and variety ofRead More Legalizing Drugs Essay1329 Words   |  6 PagesLegalizing Drugs Drug legalization is an enduring question that presently faces our scholars. This issue embraces two positions: drugs should not be legalized and drugs should be legalized. These two positions contain an array of angles that supports each issue. This brief of the issues enables one to consider the strengths and weakness of each argument, become aware of the grounds of disagreement and agreement and ultimately form an opinion based upon the positions stated within the articlesRead MoreLegalizing Drug Use2273 Words   |  10 Pagesphilosophers is because they all agree with some aspects of my writing, while disagreeing with others. One will disagree with the role of the state and the citizens, but agree with legalizing recreational drug use, while the other two will agree with the role of the state and citizens, but disagree with legalizing drug use. Karl Marx is the philosopher who would disagree with many of the arguments that I presented above. The reason why Marx would disagree with so many of my arguments is becauseRead MoreLegalizing Drugs And The United States Essay891 Words   |  4 PagesLegalizing drugs in the United States would lead to great trouble for the country affecting all citizens. Legalizing drugs will cause chaos among Americans. Edmund Harnett a deputy chief and executive officer wrote an article, â€Å"Drug legalization: why it wouldn’t work in the United States.† Harnett is also involved in the narcotics division of the New York police department. William J. Bennett the director of the national drug control policy wrote a heavy article, â€Å"Drug Policy and the IntellectualsRead MoreEssay on Legalizing Drugs or Joining the Drug Addict Circle?552 Words   |  3 PagesOver the years, drug abuse has been a rising problem in almost every country in the world. Day by day more people are invo lved in this endless cycle of drug craving, money shortage, and drug related crimes. Congressmen and politicians of United States, seeing this unstoppable crime wave which is about to spread throughout the country, begin to address various kinds of possible solutions to end this crisis in the most efficient and effective way. As discussed in Alan M. Dershowitzs The Case forRead MoreThe Effects of Legalizing Drugs Essay2011 Words   |  9 Pages(Preventable Causes of Death). And if drug-related crime and deaths were not enough for society, Marijuana is now legal in Colorado and Washington--which has already created new substance-related problems. Just the fact of legalizing it confuses teens into thinking that it’s not risky anymore, thus promoting adolescent use. Legal or not, the addictive nature of pot has always been the most influential gateway substance to either alcohol, tobacco, or hard drugs. This means that Marijuana is almostRead More Legalizing Recreational Dru gs Within the United States Essay4029 Words   |  17 Pagesrecreational drug is defined as any controlled substance used to alter ones mind state or for non-medical purposes, without the permission or supervision of a physician (Recreational Drug). Recreational drugs include both illegal and legal substances, some of which are extremely prevalent in the United States. The most popular recreational drug in the world is caffeine. Nearly, 80 - 90% of adult Americans consume caffeine every day (Caffeine addiction). Other popular recreational drugs include nicotineRead MoreLegalizing All Drugs Should Solve A Lot Of Our Country s Problem1585 Words   |  7 Pagesthis country on how to properly deal with the issue of drugs and how they should be handled. There are some people that firmly believe that legalizing all drugs will solve a lot of our country’s problems. The advocates for legalizing drugs believe that this would benefit everyone by making our streets and homes much safe r due to the fact that drug addicts will do anything for their next â€Å"fix†. Drug prices increase with the restriction of drugs by law enforcement and the addicts are desperate for moneyRead MoreDrugs Case For Legalizing Marijuana By Gore Vidal Case Study744 Words   |  3 PagesWhat would be your solution to end drug addiction? In the essay, Drugs: Case for Legalizing Marijuana†, Gore Vidal argues his solution, to legalize all drugs along with marijuana, to end drug addiction. Marijuana along with other drugs should not be legalized because they will cause more harm than good, begin leading to drug after drug, and would forever affect the world. Drugs aren’t just bad for some people, they are bad for everyone. Vidal states â€Å"Label each drug with a precise description of whatRead MoreShould Marijuana Be Legalized? Essay1049 Words   |  5 Pagesshould be considered as illegal drug, I firmly believe that marijuana should be legalized medically and recreationally. Marijuana provides its user relaxation and peacefulness which indicates that the drug does not influence bad or criminal actions. However, marijuana is still illegal in some areas where dangerous products like alcohol are legal. In the field of medicine, marijuana is one of the safest drugs among all medications nowadays. Marijuana is a very unique drug as marijuana can reduce many

Laboratory Method Free Essays

Laboratory method Lesson 42: Different Methods of Plant Propagation Reference: Effective Technology and Home Economics II By: Luz Villanueva Rojo Julia Garcia Cruz Dr. Cristina Villanueva I. Preparatory method Motivation Let the students guess the picture. We will write a custom essay sample on Laboratory Method or any similar topic only for you Order Now Jot down their guesses on the board. Reveal the picture. 1. Have you tried planting a seed? 2. Have you tried propagating a plant using different kind of method? Orientation to the Work/Activity Read this  Respiratory Activity Marcotting is another way of plant propagation where in the stems are included to take roots while still attached to the mother plant. Presentation of the Materials 1. Young plant 2. Knife 3. Moistened soil 4. Plastic 5. Coconut husk 6. String 7. Pot Procedure 1. Remove a ring of the bark below the node 3-5 cm long. 2. Scrape the cambium layer but not too deep into the wood to prevent healing before root formation takes place. 3. After the callus formation has taken place, wrap the surface with moist soil and coconut husk. . Cover securely with plastic and tie both ends using string, water the marcot regularly to prevent the drying and hardening of the soil. 5. When enough roots grow cut off the marcot just below the ball of soil that holds the root. 6. After cutting the marcot place into a pot big enough to provide sufficient room for the roots. 7. Place in a cool and shady place. 8. Precautionary Measures 1. Be careful in using the knife. 2. Make sure that your hands are covered wi th plastic when touching the soil. . Wash hands after the activity. II. Supervise Work Period or Laboratory Visit each group and observe if proper handling of tools is applied and steps are being followed correctly. III. Culminating Activities †¢Each group will have their representative to report the result of their experiment. †¢How is marcotting different from seed propagation? †¢What have you conclude after the experiment? †¢Do the process at home and produce a new plant. How to cite Laboratory Method, Papers

Modern Horror Essay Example For Students

Modern Horror Essay Gothic, a term primarily used to describe the style of architecture that flourished in Western Europe during the twelfth and sixteenth centuries. However, the word Gothic was originally familiarised be Italian Renaissance writers as a term for all art and architecture of the middle ages, which they recognised as comparable to the works of the barbarian Goths. The Gothic period or last medieval era immediately followed the Romanesque style, which is now universally considered as one of Europes outstanding artistic Genres. Gothic idiom reached its greatest heights of expression in the of of Literature. The style of writing was most popular in the late 18th and early 19th centuries, and still prevails today. The revival of the gothic phenomenon coincided with the rise of a type of romantic fiction that predominated English Literature through out the late 18th century. The principle elements were violence, the grotesque, the super-natural, and were often pictured in ruined Gothic castles or Abbes. Such buildings were characterised by pointed arches, ribbed vaults and narrow, flying buttresses, which constituted an extremely heavy structure. In that period, Authors of the Gothic emphasised mystery and horror, encouraging the reader to experience the ghastly trills that would prevail in ghost-haunted rooms, under-ground passages and upon secret stairways. Some principle writers of this period include Horace Walpole, Ann Radcliff, Mary Shelly and Edgar Allen Poe.  The earliest Gothic romance was a noel by Horace Walpole called Castle of Otranto in 1764. This novel has been continually critisised by numerous critics for its sensationalism, Melodramatic qualities, and its play on the supernatural. The Genre drew many o its intense images from the graveyard poets Gray and Thompson, intermingling a landscape of vast dark forests with vegetation that borders on extensive, concealed ruins with horrific rooms, monasteries, and a forlorn character who excels at the melancholy. The novel produced a rather different meaning to a romance story. A story in the middle ages was an unusual or exciting fictitious story about knights and their ladies. The meaning has changed from being an adventure story with elements of love added in, to being a story almost completely about love.  Horace Warpole conjured up a medieval word o passions set in melodramatic settings. In his stories, good and evil forces were brought into conflict and over the whole story looms the suggestion that irrationality and evil will destroy civilisation. His novels challenged the sensible confidence of readers. Warpoles Gothic romance immediately encouraged a number of imitators, among them Ann Radcliff, The Mysteries of Udolpho (1796) where a persecuted heroine survives numerous assaults to arrive at a happy ending in the arms of a handsome young man.  Radcliff gained a reputaion for her tlaes of terror and suspense in which apparently super-natural occurrences are explained in the last chapters by natural or normal causes. Her tales are characterised by mystery plots and poetically intense landscapes. Her books demonstrate her ability to create psychological atmospheres o horror and terror, and this influenced later Gothic heroes such as Mary Shelly, Frankenstein, and Edgar Allen Poe, The Raven. The Gothic Genre wilted under parodies such as Jane Austins Northanger Abbey (1818) but influenced later writers like Bram Stoker in Dracula (1897). Poe was one of the great American Gothic writers in the 19th century. He is well known for his tales of the mysterious and macabre. He has been described as morbid, passionate and hyper-sensitive. Among Poes poetic output, about a dozen poems are remarkable for their flawless literary construction and their haunting themes and rhymes. In The Raven, for example, the narrator is overwhelmed by melancholy and omens of death. Poe extraordinary manipulation of rhythm and sound is particularly evident in The Bells, a poem that seems to echo with the chiming of metallic instruments and The Sleeper, which reproduces the state of drowsiness. Lenore and Annabel Lee are verse lamentations of the deaths of beautiful young women. .uf44c559298e3e593f59face2313558fd , .uf44c559298e3e593f59face2313558fd .postImageUrl , .uf44c559298e3e593f59face2313558fd .centered-text-area { min-height: 80px; position: relative; } .uf44c559298e3e593f59face2313558fd , .uf44c559298e3e593f59face2313558fd:hover , .uf44c559298e3e593f59face2313558fd:visited , .uf44c559298e3e593f59face2313558fd:active { border:0!important; } .uf44c559298e3e593f59face2313558fd .clearfix:after { content: ""; display: table; clear: both; } .uf44c559298e3e593f59face2313558fd { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .uf44c559298e3e593f59face2313558fd:active , .uf44c559298e3e593f59face2313558fd:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .uf44c559298e3e593f59face2313558fd .centered-text-area { width: 100%; position: relative ; } .uf44c559298e3e593f59face2313558fd .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .uf44c559298e3e593f59face2313558fd .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .uf44c559298e3e593f59face2313558fd .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .uf44c559298e3e593f59face2313558fd:hover .ctaButton { background-color: #34495E!important; } .uf44c559298e3e593f59face2313558fd .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .uf44c559298e3e593f59face2313558fd .uf44c559298e3e593f59face2313558fd-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .uf44c559298e3e593f59face2313558fd:after { content: ""; display: block; clear: both; } READ: Sweatshops: Developed Country and Countries EssayI have noticed Poes remarkable literary construction as he uses the fewest words to describe exactly his intention and then relies upon the imagination to believe in the images and apprehensions that he powerfully builds. This is apparent in his first Gothic Novel, The Fall of the House of Usher (1839). This story contains many ideas which are typical of the Gothic genre: premature burial, the idea of the living dead, the line between life and death and acute bodily illnesses, here shown in something ordinary and not frightening, and weave elements into it to make it terrifying. He shows this in The Raven (1845).

Scuba Diving

Introduction The life of a diver highly depends on the diving gear, particularly the procedure of ensuring every part of a scuba gear is in the required conditions before the activity. It is also important to ensure quality of the gear and the people understand the procedure of using the materials during diving. The scuba diver’s life vastly depends on the equipment, and the sport is entirely equipment-dependent.Advertising We will write a custom essay sample on Scuba Diving specifically for you for only $16.05 $11/page Learn More If the gear fails, even an experienced scuba diver is in deep trouble due to the possible dangers. This essay forms a manual about scuba diving, explanation on the technical procedures of combining some parts of the equipment, importance of the parts, differences and usage. The manual also tries to answer common queries raised concerning this recreational activity. Scuba Diving Gear Scuba Masks It forms the interface bet ween the underworld and the diver. It is therefore extremely important that the equipment be personal and of best fit. Before diving, the mask has to be well garbed in place, levelled, accurately fit and defogged to ensure good visibility underwater. Unlike other masks such as the industrial mask, scuba masks are quite different since they are customized for the deep diving and underwater atmospheres. Unlike snorkelling masks that are designed for surface water sports, which are made of plastic lenses, materials used on most scuba masks include silicon as well as a tempered glass that is tough enough to overcome fogs or scratches. The main purpose of the mask is to enhance better vision underwater, but it also acts as a gear that prevents water from the diver’s nostrils. Vision is quite vital underwater since it enables the diver to read a pressure gauge and hand signs or gesture communication. According to Crockett, various scuba masks are available in the market, including the one, two, or side window masks, wide field vision masks, purge-valve masks, optical lensed masks and silicon coloured masks (34). All masks in the market are quite different in design to accommodate diverse fits for different facial shapes. It is thus advisable for any buyer to try all the available shapes before deciding a purchase. The mask has various parts as illustrated on the diagram below.Advertising Looking for essay on communications media? Let's see if we can help you! Get your first paper with 15% OFF Learn More Figure 1: Parts of Scuba Mask The lenses are made from tempered glass as opposed to plastic to prevent easy scratching or fogging. The skirt of the mask is also made of pliable solid from silicon as opposed to plastic. Silicon is more flexible and softer, thus provides a better seal on the diver’s face any prevent water from getting into the eye. While trying the mask, Hold the mask against the face, with the nose in the pocket provisio n. Ensure the skirt lies flat on the skin without folds Confirm the skirt presses well on cheeks and temple. Carry out the test without pulling the strap over the head. Ensure the strap does not come between the face and skirt of the mask. Safeguard the hair to ensure it is not trapped in the mask. A good fitting mask has a skirt that lays halfway between the mouth and bottom of the nose as shown on figure 2 below. Figure 2: Testing the Best Fit before a Purchase To check if the mask is of best fit,Advertising We will write a custom essay sample on Scuba Diving specifically for you for only $16.05 $11/page Learn More Inhale deeply and let go the mask. A perfectly fitting mask must stick to the face without air leaks as shown on figure 3 below. Facial hair especially moustache may interfere with the tests but an application of petroleum or silicon jelly can be done to assist in sealing such areas prone to leaks (Crockett, 37). Figure 3: Inhaling in the Mask to test for Best Fit If the mask seals perfectly, Simulate the mouth position assuming presence of the regulator in the mouth during inhaling process as illustrated in figure 4 below. This assists in ensuring mask remains in place even in the presence of a regulator in the mouth. Figure 4: Mouth Simulation during Inhalation to find Best FitAdvertising Looking for essay on communications media? Let's see if we can help you! Get your first paper with 15% OFF Learn More Being a gear that comes as a complete unit, the scuba mask is easy to have in place and adjust. The musk must first fit comfortably, but it is important that the diver ensure that the musk leaves very little airspace between the lenses and face. In line with Crockett, the closer the mask is to the face, the better the vision and the easier it is to equalize, adjust, prevent and clear fog (37). While putting the mask on, Pull the strap over the head and Allow the strap to pass through over the ears like sunglasses Avoid placing the skirt above the hairline as illustrated in figure 5, to avoid leaks. Figure 5: Putting the Mask On During a fit, a mask that touches the bridge of the nose or the nose is in contact with the bottom of the mask, clearly indicates that water pressure may cause more pain during diving (Crockett, 47). Figure six shows some of the aspects a diver may find necessary to check on before settling for a best fitting mask. Figure 6: Checking the Tight Spots durin g Best Fit Another simple check for a best fitting mask is by ensuring there is a comfortable way to pinch the nose closed by holding through the nose socket as illustrated on figure 7 below. Figure 7: Pinching Nose through Pocket to check for a Best fit A good mask must fit closely to the face; it leaves less air space between the face and lenses of the mask, thus providing an easier way of equalizing as shown on figure 7. Figure 8: The Distance between the Lenses and face Finding the mask’s area of vision Upon fitting to the mast to what seems to be the right position, Roll the eyeball through all direction and find out whether all the fields of sight are visible. Ensure that the amount of light into the mask is comfortable. The type of mask will determine the light regulation for instance the masks with dark silicon sealants provide less lighting, while those with clear seals allow more light into the mask. Checking all directions helps the diver to determine fitness o f the mask and the diving needs. Figure 9: Rolling the eye through all direction to ensure visibility after fitting How Scuba Mask Enhances Visibility Underwater Besides preventing blurred or distorted image, the mask is a vital gear for easy communication and clear vision in deep waters. Scientifically, the speed of light changes when it transfers from one medium to another (refraction of light), and during transfer from water and human lens in the eye, the change on the speed of light causes the diver to experience a blurry vision. The scuba mask assists because it holds some air between the water and eyes, thus allowing for the normal transfer of light from air (trapped in mask), to lens of the eye. The light waves pass from water through the mask to air inside the mask and then to the eye. However, vision through the scuba musk is still slightly distorted, but is 33% bigger in comparison to the images viewed directly through water (Zitzewits 138). Before a dive, Apply defoggin g solution on the inside of a mask, which prevents formation of fog. apply a little of this agent into the mask and rub around before a brief rinse with clean fresh water leave a thin layer of the agent inside the mask without rubbing off Divers must understand there is humidity in the air. The diver often breathes some air into the mask thus adding humidity. Condensation of such moisture fog the glass since warm air fogs due to contact with the cold lenses of the mask. The defogging agent breaks the bond between water molecules that form the fog on the inside of the mask. In line with Newman, some of the commercial defogging solutions are designed specifically for the mask (13). It is advisable to perform defogging before each dive. There are also numerous procedures of defogging, for instance use of toothpaste or flame to remove residue left after manufacturing. How to clear water from a Scuba mask It is important for a diver to have skills of clearing water from the scuba mask d uring a dive without the need to surface. Lack of such vital skills may cause nervousness. To clear the mask off water the diver need to follow the following procedure as illustrated in figure 10 below: First practice mouth or inhaling through the mouth and exhaling through nose especially if the water if felt entering the nostrils. Secondly, tilt the head downwards as a measure of trapping air in the nose, which in turn prevents water. Ensure the skirt of the mask holds firmly on the forehead by placing a strong grip on the frame of the mask or by spreading fingers along the edges. Keep head down to ensure water stays out of the nostrils. With the head tilted down, Inhale deeply through the regulator Exhale slowly but strongly through the nose Tilt head upwards gradually as you continue to exhale strongly through the nose The process need to last a couple of seconds. The exhaled air from the nose bubbles upwards into the mask, and forces the water out through the bottom of the mas k. After performing the procedure, look down towards the floor and ensure that any water that may remain in the mask does not flow into the nose. Repeat the procedure until all the droplets are completely removed Figure 10: Clearing Water from the Scuba Mask The tight grip on the upper side of the mask ensures that exhaled air does not escape from the top of the mask. Tilting the head up during the exercise also ensures that the air is retained in the mask without flowing out through the bottom or the sides. Properly skilled divers are able to clear mask fogs by letting in some water, directing the water to the lens of the mask by swishing where the fog is and clearing the water off the mask in the same way. Scuba Diving fins Divers have a wide variety of fins to choose from including the booties, spring-strapped, split, blade, and turtle beside open or close-heeled fins. According to Orr and Douglas, â€Å"Various fins have been designed for devious dives and various materials a re used to maximize propulsion and minimize the kicking efforts† (26). Types of Scuba Fins Aqualung Blade It is important to consider flexibility of fins. The aqualung blade fins shown in figure 11 below are very stiff and mostly preferred due to their enhanced feature of frog kicking to achieve better repulsion techniques for instance backing up turns. The stiffness enables the diver to propel easily and further for each kick made in comparison to the flexible fins. However, the fins are cumbersome and continuous kicks can be extremely exhausting (Orr and Douglas 26). Figure 11: Aqualung Stiff Blade fins Closed-Heels Fins They contain a packet made of rubber that covers the entire driver’s heel. According to Graver, the fins work extremely well without diver’s booties especially in warm water (31). Cold-water diver requires booties to overcome the harsh climatic conditions by keeping the feet warm especially during the on show dives. Booties have a hard bottom to enhance easy movements over rough beaches, rocks, hot surfaces before a dive. â€Å"Booties also prevent blisters since they are high enough to strap the diver’s heals and prevent direct rubs against heels during a dive or walk† (Graver 31). Figure12 below shows an illustration of the water booties. Figure 12: Scuba Booties It is critical that a diver considers the style of strap for the open heeled fins. In line with William, â€Å"Standard straps are made of flexible rubber that easily loosened, tightened or unclipped for easy wear and removal† (18). Advanced straps have tight coils to fasten round the heel, which are more durable due to the metallic materials and are more comfortable, styled and easy to remove. Figure 13 below differentiates the two type of strapping. Figure 13: Spring and Standard Rubber Straps Blade fins Blade fins are designed with continuous rubber or plastic materials with various panels, contours and holes to direct water. The fins also provide divers with a more efficient and flutter kick. The flexibility of the fins vary considerable and therefore are more appropriate for divers who wish to maintain a standard speed during a dive or wish to scuba dive through moderate currents (Bantin 11). Figure 14 below shows the differently styled blade fins. Figure 14: Differently Styled Blade Fins The split fins The split in the fin (figure 15) is meant to reduce the kicking efforts; therefore, the fins are preferable for the flutter kicking. There are also favourable among less masculine divers due to the reduced strain. They are more effective when there are fewer currents. Figure 15: Split fins Snorkelling Fins The fins are easy to manipulate due to their sizes. They also provide the diver an easy way of balancing in shallow waters; however, they fail to provide adequate propulsion for scuba diving, this means that the diver has to compensate with faster and harder kicks (Bantin 37). Figure 16 below provides an il lustration of the Snorkelling Fins Figure 16: Snorkelling Fins Turtle fins The shape (short and stiff) and type of material gives them a more definitive design. They are more thick and heavier and work perfectly during the technical or advanced dives. A kick with the fins provides a more propelled effect but causes greater exhaustion. As seen on figure 17 below, the designs of these fins are simple but the equipment is still considered as one of the most effective fin. Most stores still stock the classic version but with diverse styles. In line with Bantin, the technical diver prefers the fins due to the great repulsive force they provide, and the size is effective during navigation in compacted areas where there are dangers of kicking the ceiling (37). Figure 17: Turtle fins Free-diving Fins As figure 18 below illustrates, the fins have very long, thin and stiff fins that make them very unfavourable among the recreational divers. The fins are preferable during frog and flutter ki cks due to their long blades. Although most divers do not prefer these fins due to the involved technicality of manipulation, they provide easy, quicker and very strong repulsive movements. Figure 18: Free-diving Fins Coloured Fins The colours come in handy during a dive where individuals are easy to locate and identify especially the brightly coloured one in poor visibility areas. Neon, orange, yellow, red, sky-blue are common bright colours as figure 19 below illustrates. Figure 19: Coloured Fins Innovative Fins They are specially designed with elastic enhancements such as rubber to add effectiveness during a kick. Some have a gear shifting mechanism for adjustment during a dive in the aim of decreasing or increasing resistance (Bantin 37). Figure 20: Innovative Fins Snorkels This is a safety equipment used together with the breathing regulators particularly when there are difficulties regarding keeping the head above the waves. The equipment is simply a bent tube with a mouthp iece attached at the bottom. The side is attached to the scuba mask through a clip and the other end (top-tube) extending above the head to stick out of the water surface and form a provision for easy breathing when the head is completely submerged. The clip enables the diver to use the snorkel without need to hold it in place. Figure 21 below shows various parts of a snorkel. The top of the equipment can be completely open, with a classic and easy to use design, but water splashing on the top drains directly into the mouthpiece. There thus more favourable in calm conditions, otherwise the diver is forced to clear water splashing into the open top (Bulenkov 7). Figure 21: Parts of a Snorkel Angled Snorkels Slightly angled snorkels are better since they provide a drier top by preventing water from entering, unless when completely submerged. The top covering consists of vents angled to divert splashing water. Although the snorkels provide easiness of breathing, they are favourable in calm and less wavy conditions but are heavier at the top compared to the open tops. Figure 22: Angled Snorkels Fully dry-top Snorkels seal water even when the diver submerges completely. The top is implemented with simple scientific mechanism of folds and valves. The system closes when a diver submerges thus eliminating need to clear water upon return to the surface. If the diver is using a snorkel that does not incorporate purge valves as illustrated in figure 23, water can easily enter the tube. In such a case, Exhale powerfully to ensure water blows out through the top Figure 23: Snorkels without Purge Vales The blowing cannot affect or break any part since the purge valve is absent. Unlike the snorkels with a purge valve at the base (illustrated in figure 24 below), those without the valve are very durable due to the simplicity. According to Bulenkov, Snorkels with valves are easier and faster to clear and are thus rapidly gaining the standardisation prominence in the marke t (8). Figure 24: Snorkels with Purge Vales Rigid Tube Snorkels The rigid nature of this snorkels assist in maintains the tube’s shape thus prevents bending. The equipment can be comfortable to the user but it need to be of the right fit. Ensure best fit of the rigid tube snorkel during mask fitting exercise. Check the angle of inclination to ensure it does not leave big space A good angle fit is closer to the diver’s face. Flexible Snorkels They have corrugated plastic or silicon connection between the upper and bottom portions. They are easy to fit due to the flexibility. The flexibility come in handy during diving where the diver can replace the snorkel with the regulator and the mouthpiece hangs sideways away from destructing the diver. Figures 25 and 26 below show the differences between the rigid and flexible tube snorkels. Figure 25: Rigid-Tubed Snorkels Figure 26: Flexible-Tubed Snorkels Nautilus Snorkel As figure 27 below illustrates, this snorkel is a fl exible and easy to fit into a carrying case and can be stashed in the Buoyancy compensator pockets or left loose on the rings. Upon removal, the device springs open into shape. It may lack other critical features, but the flexibility makes the device a favourite for some divers. Figure 27: Nautilus Snorkel Oceanic Pocket Snorkel The Oceanic Pocket Snorkel is highly comparable to the Nautilus Snorkel, but it has a strapping to keep it folded when not in use. Oceanic pocket snorkel has a purge valve on top that is tougher, thus making it not fold to a small size like the Nautilus. Figure 28 below shows the oceanic pocket snorkel. Figure 28: Oceanic Pocket Snorkel The Mouth Pieces According to Treinish, these are part of the snorkel that fits into the diver’s mouth and are made of soft silicon manufactured in diverse shapes for best fits as illustrated on figure 29 below (253). The diver must: Find the right type and size Check the styles for instance strapping for easy fits and comfort Decide the ease of clearing collected water Most mouthpieces have a small reservoir extension to prevent water that drains into the tube from dripping directly into the diver’s mouth. The dive can still breathe with ease even when some water has collected in the snorkel. The reservoir thus provides easiness on usage and clearing collecting water (Treinish 254). Figure 29: Various Mouth Pieces Mask Connectors The connectors that attach the snorkels to the masks are diverse depending on manufacturers, as illustrated below. Figure 30: Various Mask Connectors on Snorkels Test for attachment and detachment before diving. If it works well in air, then it is good for diving. If they detach easily in air then hold to them during roll or a jump to avoid loss. Ensure that the connection allow easy movement of snorkel One of the attachments uses a permanently mounted loop and a hook that provides a quicker way of detaching and attaching. Another has a hook that slides o ver the tube and provides a slower but ascertained way of attaching. The snorkel keeper has two loops made from plastic, which slides over the tube. It is equally a slow mechanism but cannot be detached accidentally. Other connectors have adjustable clips attached to the snorkel. Scuba Tanks and Regulators Scuba tanks are mainly made from steel and aluminium to hold compressed air. Aluminium is lighter in weight but need to be designed with thicker walls to sustain the compressed air inside. Aluminium is also easily dented and scratched. On the other hand, steel tanks rust easily in presence of moisture. Perform periodical tumbling to remove oxidation from the inside of the aluminium tank Considers the scuba tank dry-weight (weight when empty) before a hiking any significant distances. Choose a low capacity tank during shallow diving and high capacity during longer deep diving or if you have high consumptions. Fill the tanks at reliable stations to ensure they are only filled with dry air. Avoid emptying the tank completely Take the tank for frequent tumbles to remove any rusts Ensure compressed gas tanks are or have been taken for a hydrostatic test. Check the test date Inspect tanks frequently especially at the neck threads for possible clacks that can cause gas leaks and loss. Check the type of regulator. Do you prefer DIN or Yoke? To determine the type of regulator, look for an O-ring at the valve attaching to the tank. If the O-ring is present, then the valve is a DIN otherwise, it is a yoke. Figure 31 show a DIN while figure and 32 a yoke regulator. Figure 31: DIN Scuba Tank Regulator Figure 32: Yoke Scuba Tank Regulator Air consumption from a scuba tank during a dive The support expectancy of air in a scuba tank depends on the diver’s consumption rate technically termed as â€Å"Surface Air Consumption Rate (SAC rate) or the Respiratory Minute Volume† (Leaird 43). Divers with large lung volumes (tall and those with big BMI (Body Mass I ndex)) need more air that the short or petite persons. Other factors that determine consumption include diving experience levels /specialty on diving, stress, exercise done before a dive and ability to control buoyancy. To limit air intake and ensure consistent supply, Relax and practice slow and deep breathing patterns End the dive before reaching the air supply limit Calculate the no-decompression limit Plan and monitor the dive time Do not exceed the planned depth Avoid reaching the â€Å"no-decompression limit† during a dive Use â€Å"enriched air nitrox† Ascend with a friend who has reached the supply limit Have a contingency plan Factors that determine durability of air in a scuba tank during a dive include: The tank volume Consumption rate The pressure of water Buoyancy Control and Effects of Buoyancy on Divers: Inflate and deflate the â€Å"Buoyancy control Device (BCD)† to increase or decrease buoyancy respectively during a dive (Leaird 89). Use le ad weights to descend and stay down as the scuba tank empties Scuba Regulators The regulator enables the diver to breath from the scuba tank during underwater dives. The equipment is called a scuba regulator because of controlling the amount of air the diver breathes. It is not possible to breath directly from the tank since the air is highly compressed (strongly pressured). The regulator reduces pressure from the tank to an intermediary section before its final regulation to the diver. Parts of a Scuba Regulator According to Bantin, the gear has various accessories but two main stages (68). Figure 33: Parts of a Scuba Regulator First point of regulation: Controls the air pressure by reducing it to an intermediate pressure point, through a low-pressure hose. As shown on figure 34 below, first-point regulator connects to four different hoses, three to the second point of regulation as well as the buoyancy compensator and one hose to the gauge. Figure 34: First Point of Regulatio n First-Stage Body Yoke Yoke Screw Dust Cap Port/Port plug Second Point of regulation: Assists in providing the diver with an ambient pressurized air that is equivalents to surrounding pressure in air and water. It forms the safe breathing point for the diver. It attaches to the open water valve discussed earlier and thus acts as the other breathing-point/alternative during a deep dive. Figure 35: Primary Second Stage Regulator Purge Button Ease of breathing regulator Exhaust valve Mouthpiece An alternative second point of regulation: Forms a backup for the second point regulator. A diver can share air with a fellow diver during a deep-water dive through this point. This alternative point is today a standard safety diving console for a diver (Bantin 68). Figure 36 Secondary Second Stage Regulator Mouthpiece Low pressure Hose Plunge button Air Adjuster Submersible pressure scale and related console: It is a gauge for monitoring air usage during a dive to avoid run-outs. It connects to the first regulator through a high-pressure tube, and provides a point of reading direct pressure from the scuba tank. Other gauges that work in line with the pressure gauge include the depth gauge; computer console and diver compass (William 35). Figure 37: Inflator Hose connector Sleeve Buoyancy Compensator opening A low pressure inflating tube: According to Leaird, this is a critical low-pressure hose that assists in quick transfers of air from the first stage regulator to the â€Å"Buoyancy Compensator’s (BC) inflator† (42). Figure 38: Submersible Air/Pressure Gauge Depth Gauge Submersible Pressure Gauge Buoyancy Compensators (BCs/BCDs) BCD is an inflated jacket that assists divers to experience and control neutral buoyancy. Common compensators are designed as vests or jackets, which connects the diver to the scuba tank during a deep dive. Other designs include the back wing that is often used during technical dives and the classic â€Å"ho rse collar† design. A sample design is illustrated on figure 39 below. Figure 39: Buoyancy Compensation/Control Device (BCD) How to use the buoyancy compensator Once in deep waters, add air to the buoyancy compensator in order to experience neutral buoyancy. Inflate the compensator completely to enjoy a surface dive with head above water Attach the scuba tank to the jacket scuba compensator, during recreational diving Attach the scuba dive accessories to the d-ring and pockets of the compensator for instance the torch/light, knife or slates. Features of a Buoyancy Compensator to consider before a purchase Choose the style of inflating (back inflating or vest style) depending on experience and expected usage. Vest-style is easy to use and ensures easy floating, thus best suited for surface diving Squeeze the chest when the vest-styled compensator is fully inflated Choose the right lift required for a dive When using trim weight pockets of the compensator, distribute them ac cordingly to balance the swimming position Deflate the compensator from the standard locations whenever necessary As figure 40 below illustrates, the diver can deflate the compensator through the buoyancy compensator hose, but it should be raised towards the surface Figure 40: Deflating a Buoyancy Compensator using its Hose Scuba Dive Computer It is a device for monitoring diver’s heart rates as a measure to manage workload. The digital huge display of the device enhances readability during a dive. The device also keeps track of the dive remaining bottom time (RBT), temperature, tank pressure, bearing for easy navigation during a dive and depth. The information is observable both during a dive and later since all information is committed to a logbook memory. The diver is thus advised to Always upgrade the computer system software through the wireless or infrared interface Review the calculated deco data especially the gas mixes Check all the alarm warnings and text message s during a dive Scuba Wetsuit According to William, it is scientifically proven that water conducts heat away from the human body twenty times quicker than air (8). A wetsuit thus prevents water from cooling and eventually chilling the diver due to the mechanism of slowed heat loss. The suit also protects against scratches from the aquatic life such as corals. The wetsuit traps a thin layer of water against the skin and the water is heated to a temperature near normal. Scientifically, â€Å"water conducts less heat away from diver than the cooler surroundings, thus keeping the body warm†¦Ã¢â‚¬  (William 7). Wet suits are made of neoprene, which is a material made from compressed air bubbles sealed in rubber. Before settling for a choice of suit, Wear a suit that fits properly to ensure trapped heat does not circulate off the body. Remember that wetsuit is not a sufficient gear to provide required warmth if the dive is lengthy or through extreme conditions (iced water). Ensu re tightness of the suit for easy in trapping warmth, but also ensure easiness of breathing and blood circulation. Consider the thickness of the suit. Thicker suits are warmer Choose between the short or full wetsuits. Figure 41 shows the short and long wetsuits. Figure 41: Short and Long Wetsuits Conclusion Although there are many related equipment associable with scuba diving as a recreational activity, figure 42 below illustrates some of the most critical items to think through before considering the sport. Figure 42: Basic Scuba Diving Equipment Works Cited Bantin, John. The Scuba Diving Handbook: The Complete Guide to Safe and  Exciting Scuba Diving. Canada: Firefly Books, 2007. Print. Bulenkov, Ye. Soviet Manual of Scuba Diving. Florida, FL: The Minerva Group, Inc., 2004. Print. Crockett, Jim. The Why-To of Scuba Diving. Ney York, NY: Aqua Quest Publications, Inc. 2002. Print. Graver, Dennis. Scuba Diving. Illinois, IL: Human Kinetics. 2010. Print. Leaird, Tom. This Thin g called Scuba. Indiana, IN: Xlibris Corporation, 2010. Print Newman, John. Scuba Diving and Snorkelling for Dummies. New Jersey, NJ: John Wiley Sons Ltd. 2011. Print. Orr, Dan, and E. Douglas. Scuba Diving Safety. Illinois, IL: Human Kinetics. 2007. Print. Treinish, Steve. Technical Rescuer: Water levels. Kentucky, KY: Cengage Learning, 2009. William, Koelzer. Scuba Diving: How to get Started. New York, NY: Chilton Book Co. 1976. Print Zitzewits, Paul. The Handy Physics Answer Book. Michigan, MI: Visible Ink Press. 2011. Print. This essay on Scuba Diving was written and submitted by user Jonathon Juarez to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. You can donate your paper here.

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Malunggay Bark Extract As Alternative Source The 21st century trend is an era in which technologies become part of human lives. In this age, efforts and time are exhausted by many individuals or groups in order to create technologies that can be utilized in any human endeavour. Conversely, for most of these innovations and inventions to function, electricity is required. In the Philippines, a country that is abreast with technologies, majority of the electricity requirement is derived from electric power plants that are run by fossil fuels such as petroleum and coal. Moreover, batteries which are portable source of the said energy are also in use. However, due to rapid increase in technologies that require electricity, some problems arise. At present, since there is a huge demand for electricity, fuel required to generate such energy becomes scarce. 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Aside from the nutritional value of some parts of malunggay, all parts of this tree are used in herbal medicine to cure some diseases. Given that this tree can serve several purposes, malunggay becomes in demand. In light of the discussion of the environmental problems and characteristics of malunggay, a group of researchers conducted a study entitled MOB Electricity: Malunggay Bark Extract as Alternative Source of Electricity, to show that malunggay (Moringa oleifera) bark extract is a viable alternative source of electricity; consequently, providing an environment friendly, inexpensive and accessible source of electricity. At this point in time, since there is a strong desire to improve way of living, great attention is given to technologies. Due to this interest, innovations and inventions which require electricity are continuously developed. Thus, electricity must be continuously generated. On the contrary, most of the processes and materials for electricity generation pose hazards to the environment and human health. Therefore, a clean, low cost, and readily available source of electricity is needed, a reason that motivated the researchers to engage in this investigatory project. B. Statement of the Problem This study entitled MOB Electricity: Malunggay Bark Extract as Alternative Source of Electricity intends to investigate the feasibility of Malunggay (Moringa oleifera) bark extract as an alternative source of electricity. Specifically, this study sought to answer the following questions: 1. Is there a significant difference on the amount of voltage measured from liquid form of malunggay bark extract obtained through crude and ethanol extraction? 2. Is there a significant difference on the amount of voltage measured from jelly form of malunggay bark extract obtained through crude and ethanol extraction? 3. Is there a significant difference on the amount of voltage measured from liquid and jelly form of malunggay bark extract obtained through crude and ethanol extraction? 4. Is there a significant difference on the amount of voltage measured from varying amounts of malunggay bark extract? C. Hypotheses 1. Ho: There is no significant difference on the amount of voltage measured from liquid form of malunggay bark extract obtained through crude and ethanol extraction. Ha: There is a significant difference on the amount of voltage measured from liquid form of malunggay bark extract obtained through crude and ethanol extraction. 2. Ho: There is no significant difference on the amount of voltage measured from jelly form of malunggay bark extract obtained through crude and ethanol extraction. Ha: There is a significant difference on the amount of voltage measured from jelly form of malunggay bark extract obtained through crude and ethanol extraction. 3. Ho: There is no significant difference on the amount of voltage measured from liquid and jelly form of malunggay bark extract obtained through crude and ethanol extraction. Ha: There is a significant difference on the amount of voltage measured from liquid and jelly form of malunggay bark extract obtained through crude and ethanol extraction. 4. Ho: There is no significant difference on the amount of voltage measured from varying amounts of malunggay bark extract. Ha: There is a significant difference on the amount of voltage measured from varying amounts of malunggay bark extract. D. Significance of the Study This study will provide the energy sector in the country a green alternative source of electricity which will reduce the use of materials that have hazardous effects to human and environment. Hence, minimizing occurrences of diseases and slowing the rate of environment degradation. Furthermore, the positive result of this study could also assure people with inexpensive and accessible source of electricity. Moreover, this study introduces a new application of malunggay, thus, further increasing the demand for this tree. In this effect, farmers in the country could have extra income by providing the needed supply of malunggay. E. Scopes and Limitations The focal point of this study is the feasibility of malunggay (Moringa oleifera) as an alternative source of electricity. In order to assess the said feasibility, malunggay bark extract obtained through crude and ethanol extraction was utilized. Subsequently, voltage was measured for different set-ups and treatments. However, the researchers were unable to determine the component of the extract responsible for electricity generation since the material was not subjected to chemical analysis. This restriction might be an additional recommendation for future researches. The researchers conducted this study from January 9, 2012 to August 23, 2012. All experiments and observations were done at JICA laboratory of Sapang Palay National High School. F. Operational Definition of Terms Gelatin Powder used to create a firm form of extract. Carbon Rod -served as the positive electrode (anode) of the external circuit connected to malunggay bark exract. Zinc Plate served as the negative electrode (cathode) of the external circuit connected to malunggay bark extract. Multi-tester used to measure the amount of voltage from malunggay bark extract. CHAPTER II REVIEW OF RELATED LITERATURE I. Introduction In the onset of the 21st century, negative effects of environmental issues such as pollution, ozone depletion, and global warming become notable. Thus, these problems gained the attention of people around the world. Among these negative effects are development and widespread of diseases, development of skin cancer, increase in temperature, heavy rains, heavy floods, strong typhoons, and climate change. In response, organizations are created, and conventions and researches are conducted to deal with these issues. Today, as data are continuously gathered;various human activities that involve emission of gases, chemicals, and radiations are considered as one of the large contributor to environmental degradation. Such human activities include generation of electricity. However, since electricity is vital in operating technologies which advances human lives, search for clean alternative source of electricity should be conducted to prevent further degradation of the environment. II. Electricity Generation Electricity is the form of energy that has the highest demand at this point in time. This energy form is required to operate technologies that people created for life advancement. Thus, energy industries are in continuous search to supply the needed demand of electricity. Today, there are different sources from which this energy is derived. These sources include fossil fuels (petroleum and coal), nuclear energy, hydropower, solar energy, and wind energy. These sources are used to drive turbines in electric power plants which will generate electricity. Electricity generated from these sources is the one supplied in wall sockets of houses and buildings. Another source of electricity is battery, a source that is in portable form. (Bose, 2010) In the Philippines, a country that is abreast with technologies, majority of the required electricity is derived from electric power plants that are run by fossil fuels such as petroleum and coal. Moreover, batteries which are portable source of the said energy are also in use. However, emissions from such electric power plants are composed of gases which cause air pollution and contribute to global warming. Likewise, batteries have chemical components that can leak and pollute land, water and air. In addition to these negative effects to the environment, human can also acquire diseases due to said contamination. (Petrina, 2007) III. Green Electricity People are now aware of the harmful effects of conventional electricity generation to human health and environment. Consequently, efforts and time are spent in order to discover alternative green clean, natural, biological sources of electricity, an action that would minimize presence of harmful chemicals and gases in the environment. In connection to this notion, researchers have considered different plants, different parts of plants, and organisms as potential source of green electricity. (U.S Environmental Protection Agency, 2012) Basic example of green energy is electricity from fruits and vegetables. Many people, during childhood, have done classroom experiments to derive electricity from lemon and potato. Results of these experiments proved that these materials can generate electricity because juices of fruits and vegetables act as electrolytes which initiate reaction to free and move electrons. (Renico, 2012) On the other hand, another related research was conducted by scientists of Stanford University which harness electricity from algae. The concept behind this project is the process of photosynthesis involved in food production of plants. According to the scientists, in this process, electrons from water are given with high energy by sunlight. These electrons are the one the scientists captured using electrodes. (Stanford University, 2010) Lastly, researchers of Arizona State University study the possibility for bacteria to generate electricity through the use of a microbial fuel cell (MFC) which contains waste water and bacteria dwelling on the material. In this research, the persons involve relate electricity generation to metabolic activity of bacteria. (Arizona State University, 2008) IV. Malunggay Tree Malunggay (Moringa oleifera) tree, which commonly grows in tropical countries such as Philippines, is characterized by long, straight, white trunks; small, green, compound leaves; and seasonal white flowers that yields long pods. This tree propagates easily and does not require much attention. In fact, malunggay seeds or matured stem cuttings can be planted in any kind of soil and does not require regular maintenance. (Asia Green Group, 2012) In the Philippines, malunggay can be found in most household backyards because edible parts of this tree (flowers, pods, and leaves) are part of Filipino cooking. Moreover, these parts of malunggay tree provide people with vitamins and minerals needed by the body. Aside from providing nourishment, this tree also has medicinal value. Based on numerous studies, malunggay contains chemicals that have antibacterial, anticancer, and anti-inflammatory properties. (Fahey, 2005) CHAPTER III METHODOLOGY Gathering of Materials/Equipments Among the materials gathered by the researchers were malunggay (Moringa olifera) bark, gelatin powder, ethyl alcohol, filter paper, gloves, face mask, and old batteries. Equipment as well was borrowed from the school laboratory. These equipments include beakers, reagent bottles, funnel, stirring rod, thermometer, mortar and pestle, alcohol lamp, triple beam balance, strainer, tripod, and wire gauze. Collection of Zinc Plate and Carbon Rod Researchers collected old batteries. Subsequently, these batteries were uncovered and electrolyte inside was removed. Since electrolyte component of battery is composed of slightly toxic chemicals, researcher wore gloves and face mask. In this manner, zinc plates and carbon rods were obtained. Preparation of Malunggay Bark Extract A. Crude Extraction Malunggay barks were collected and cut into small pieces by the researchers. Afterwards, the barks were placed in a blender. Finally, in order to obtain pure extract, minced barks were placed in soft cloth and squeezed. B. Ethanol Extraction Malunggay barks were collected and cut into small pieces. Then, barks were placed in a blender to mince the material. Next, minced barks were oven-dried for 5 minutes and were pulverized with mortar and pestle. After this process, 100 grams of pulverized bark was placed in a reagent bottle in which 250 ml of ethyl alcohol was poured afterwards. Lastly, extract which was rested for 10 hours for purification purpose was filtered through a funnel with filter paper. Varying the Amount of Bark Extract Amount of bark extract obtained through crude and ethanol extraction was varied for each treatment. 5 ml of extract was allotted to Treatment I, 10 ml for Treatment II, and 15 ml for Treatment III. Preparation of Jelly Form of Malunggay Bark Extract In a beaker, constant volume (5 ml) of water was poured and heated to 70oC. When water reaches the specified temperature, constant amount (10 g) of gelatin powder was added into the water. Then, the solution was continuously stirred. Before the solution solidifies, the assigned amount of extract per treatment was poured without stopping the stirring process. Material was immediately removed from heat. Measuring Voltage Zinc plate and carbon rod were installed to each treatment. From these electrodes, multitester was connected to measure voltage. Measurement was done for five times. Subsequently, voltage measured from each treatment was recorded. METHODOLOGICAL FLOWCHART CHAPTER IV RESULTS AND DISCUSSIONS The researchers conducted several experiments. Subsequently, data and results obtained from these experiments were recorded in tabulated from in this chapter. After each table of data, interpretations of these results were discussed. In the aid of these interpretations, the researchers could have initial assessment of the hypotheses presented in this paper. Table 2.0 shows that jelly form of extract from crude extraction yielded higher amount of voltage than jelly form of extract from ethanol extraction. However, more uniform voltage reading is obtained from jelly ethanol bark extract than jelly crude bark extract; as the amount of extract increases, amount of voltage reading increases. Table 3.0 shows that both form of crude bark extract generated relatively high amount of voltage. Even so, jelly crude bark extract yielded fluctuating amount of voltage as the amount of extract increases. Table 3.1 shows that as amount of liquid ethanol bark extract increases, amount of measured voltage decreases. For jelly form of bark extract from ethanol extraction, voltage reading increases, as the amount of said extract increases. CHAPTER V SUMMARY, CONCLUSIONS, AND RECOMMENDATIONS Summary: This study entitled MOB Electricity: Malunggay Bark Extract as Alternative Source of Electricity aspires to prove if malunggay bark extract could be a possible source of electricity and to ascertain if there would be a significant difference when the method of extraction, form of extract, and amount of extract are varied. In order to test the feasibility of malunggay bark extract as alternative source of electricity, the researchers prepared two different set-ups and under each set-up there are three treatments. For the second set-up, amount of gelatin powder and amount of water used in each treatment were controlled. Then, voltage was measured in each treatment per set-up for five times using a multi-tester. The results obtained from different set-ups were analyzed using Two-Factor ANOVA with Replication. The results are summarized as follows: On the first set-up, statistical analysis showed that there is significant difference in the amount of voltage measured from liquid form of malunggay bark extract when method of extraction and amount of extract were varied. On the second set-up, statistical analysis showed that there is significant difference on the amount of voltage measured from jelly form of malunggay bark extract when obtained through different extraction method. Furthermore, statistically significant difference also exists on the amount of voltage reading when the amount of said form of extract was varied. Statistical analysis of Tables 3.0 and 3.1 indicate that there is significant difference on the amount of voltage measured when the form of extract and amount of extract were varied. Conclusion: Based on the results of statistical analysis and observations, the researchers conclude that malungggay bark extract could be a viable alternative source of electricity. Moreover, the people behind this study were able to discover that the 15 ml liquid form of extract obtained through crude extraction yielded the highest and most stable amount of voltage among all the treatments done. Recommendations: In this study the researchers encountered some hindrances which limited the scope of the investigation. Hence, only test for the feasibility of malunggay bark extract as an alternative source of electricity was conducted. Nonetheless, the study does not end with this objective. There are other factors related to electricity generation in malunggay bark extract that should be considered. Researchers would like to propose the following to other people who consider pursuing this project: Further increase volume of extract in order to obtain higher voltage reading. Convert the extract in a form that will facilitate easier and more stable voltage measurement. Subject the extract to chemical analysis to determine the component responsible for electricity generation. Develop a way to harness electricity from the extract.

Graduation Speech: Use Your Strengths to Help Others :: Graduation Speech, Commencement Address

Wow! 12 years of hard work, 12 years of perseverance, 12 years of dedication! A great king once said, "The way of a fool is right in his own eyes, but a wise man is he who listens to counsel." We each have mentors in our life who give us this counsel. What we choose to do with it determines if we are considered foolish or wise. Naturally, we tend to think we are always right, and even on the occasions when we are right, there is always something to learn from a second opinion. Take just a second to think back over the last 18 years of your life. Think of all the second opinions you've received. These opinions and the people who shared them go you to this point. While you may think you got here through your own doing, think a little harder and consider those days when all you wanted to do was climb trees, play with Barbie dolls or watch "Teenage Mutant Ninja Turtles" all day long. What changed that? Was there one day when, suddenly, in your most mature five-year-old voice you said, "Mom, Dad, I've made a decision. I want to start saving for college. Could you please put my allowance in a bank account for me?" Personally, I can say that I did not have one of those days. As diligent as you may think I am to my studies, I can say for certain that I would have loved to just play outside all day and stay up late watching movies. However, as much fun as I would have had, I would not have gotten very far. Thankfully, I had numerous people in my life who showed me, at just the right times, how to grow. Think of your teachers, preschool through high school, who cared enough each day to come to school to a class of at least 30 kids who each had their own agenda and were able to make each child's agenda important. Think of your friends, brothers and sisters, aunts and uncles, grandparents and others who have showed you how to be a good friend and how to grow in relationships, simply by being there. Think of coaches and instructors you've had who pushed you to do things you didn't want to do so that you would achieve the things you wanted to achieve.

Air Pollution Essay

BEIJING — Outdoor air pollution contributed to 1.2 million premature deaths in China in 2010, nearly 40 percent of the global total, according to a new summary of data from a scientific study on leading causes of death worldwide. Figured another way, the researchers said, China’s toll from pollution was the loss of 25 million healthy years of life from the population. The data on which the analysis is based was first presented in the ambitious 2010 Global Burden of Disease Study, which was published in December in The Lancet, a British medical journal. The authors decided to break out numbers for specific countries and present the findings at international conferences. The China statistics were offered at a forum in Beijing on Sunday. â€Å"We have been rolling out the India- and China-specific numbers, as they speak more directly to national leaders than regional numbers,† said Robert O’Keefe, the vice president of the Health Effects Institute, a research organization that is helping to present the study. The organization is partly financed by the United States Environmental Protection Agency and the global motor vehicle industry. What the researchers called â€Å"ambient particulate matter pollution† was the fourth-leading risk factor for deaths in China in 2010, behind dietary risks, high blood pressure and smoking. Air pollution ranked seventh on the worldwide list of risk factors, contributing to 3.2 million deaths in 2010. By comparison with China, India, which also has densely populated cities grappling with similar levels of pollution, had 620,000 premature deaths in 2010 because of outdoor air pollution, the study found. That was deemed to be the sixth most common killer in South Asia. The study was led by an institute at the University of Washington and several partner universities and institutions, including the World Health Organization. Calculations of premature deaths because of outdoor air pollution are politically threatening in the eyes of some Chinese officials . According to news reports, Chinese officials cut out sections of a 2007 report called â€Å"Cost of Pollution in China† that discussed premature deaths. The report’s authors had concluded that 350,000 to 400,000 people die prematurely in China each  year because of outdoor air pollution. The study was done by the World Bank in cooperation with the Chinese State Environmental Protection Administration, the precursor to the Ministry of Environmental Protection. There have been other estimates of premature deaths because of air pollution. In 2011, the World Health Organization estimated that there were 1.3 million premature deaths in cities worldwide because of outdoor air pollution. Last month, the Organization for Economic Cooperation and Development, based in Paris, warned that â€Å"urban air pollution is set to become the top environmental cause of mortality worldwide by 2050, ahead of dirty water and lack of sanitation.† It estimated that up to 3.6 million people could end up dying prematurely from air pollution each year, mostly in China and India. There has been growing outrage in Chinese cities over what many say are untenable levels of air pollution. Cities across the north hit record levels in January, and official Chinese newspapers ran front-page articles on the surge — what some foreigners call the â€Å"airpocalypse† — despite earlier limits on such discussion by propaganda officials. In February, the State Council, China’s cabinet, announced a timeline for introducing new fuel standards, but state-owned oil and power companies are known to block or ignore environmental policies to save on costs. A study released on Thursday said the growth rate of disclosure of pollution information in 113 Chinese cities had slowed. The groups doing the study, the Institute of Public and Environmental Affairs, based in Beijing, and the Natural Resources Defense Council, based in Washington, said that â€Å"faced with the current situation of severe air, water and soil pollution, we must make changes to pollution source information disclosure so that information is no longer patchy, out of date and difficult to o btain.† Chinese officials have made some progress in disclosing crucial air pollution statistics. Official news reports have said 74 cities are now required to release data on levels of particulate matter 2.5 micrometers in diameter or smaller, which penetrate the body’s tissues most deeply. For years, Chinese officials had been collecting the data but refusing to release it, until they came under pressure from Chinese who saw that the United States Embassy in Beijing was measuring the levels hourly and posting the data in a Twitter feed, @BeijingAir. Last week, an official Chinese news report said the cost of environmental degradation in China was about $230 billion in 2010, or 3.5  percent of the gross domestic product. The estimate, said to be partial, came from a research institute under the Ministry of Environmental Protection, and was three times the amount in 2004, in local currency terms. It was unclear to what extent those numbers took into account the costs of health care and premature deaths because of pollution. National Park Service Air Pollution – Its Nature, Sources, and Effects http://www.nps.gov/shen/naturescience/airpollution.htm Last Updated: 04/09/2014 Summer View, mountains in the distance from Skyline Drive. John F. Mitchell – NPS Volunteer Introduction Air pollution occurs in many forms but can generally be thought of as gaseous and particulate contaminants that are present in the earth’s atmosphere. Gaseous pollutants include sulfur dioxide (SO2), nitrogen oxides (NOx), ozone (O3), carbon monoxide (CO), volatile organic compounds (VOC), hydrogen sulfide (H2S), hydrogen fluoride (HF), and various gaseous forms of metals. These pollutants are emitted from large stationary sources such as fossil fuel fired power plants, smelters, industrial boilers, petroleum refineries, and manufacturing facilities as well as from area and mobile sources. They are corrosive to various materials which causes damage to cultural resources, can cause injury to ecosystems and organisms, aggravate respiratory diseases, and reduce visibility. Particulates come in both large and small or â€Å"fine† solid forms. Large particulates include substances such as dust, asbestos fibers, and lead. Fine particulates include sulfates (SO4) and nitrates (NO3). Important sources of particulates are power plants, smelters, mining operations, and automobiles. Asbestos and lead affect organisms, while sulfates and nitrates not only cause health problems, but also contribute to acid rain or acid deposition and a reduction in visibility. Particulate matter, a term sometimes used instead of particulates, refers to the mixture of solid particles and liquid droplets found in the air. Toxic air pollutants are a class of chemicals which may  potentially cause health problems in a significant way. The sources of toxic air pollutants include power plants, industries, pesticide application, and contaminated windblown dust. Persistent toxic pollutants, such as mercury, are of particular concern because of their global mobility and ability to accumulate in the food chain. More research is needed to fully understand the fate and effects of mercury and the many other toxic pollutants. Primary pollutants are those that are emitted directly into the air from pollution sources. Secondary pollutants are formed when primary pollutants undergo chemical changes in the atmosphere. Ozone is an example of a secondary pollutant. It is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) are mixed and warmed by sunlight. Ozone (O3) is a major component of what is often referred to as smog. The ozone which is present in the troposphere, or the atmosphere that is close to the ground, should not be confused with beneficial ozone that is located in the stratosphere or upper atmosphere. This beneficial ozone in the stratosphere helps protect the earth from harmful ultraviolet light from the sun. Sources of Air Pollution Stationary and Area Sources A stationary source of air pollution refers to an emission source that does not move, also known as a point source. Stationary sources include factories, power plants, dry cleaners and degreasing operations. The term area source is used to describe many small sources of air pollution located together whose individual emissions may be below thresholds of concern, but whose collective emissions can be significant. Residential wood burners are a good example of a small source, but when combined with many other small sources, they can contribute to local and regional air pollution levels. Area sources can also be thought of as non-point sources, such as construction of housing developments, dry lake beds, and landfills. Mobile Sources A mobile source of air pollution refers to a source that is capable of moving under its own power. In general, mobile sources imply â€Å"on-road† transportation, which includes vehicles such as cars, sport utility vehicles, and buses. In addition, there is also a â€Å"non-road† or â€Å"off-road†Ã‚  category that includes gas-powered lawn tools and mowers, farm and construction equipment, recreational vehicles, boats, planes, and trains. Agricultural Sources Agricultural operations, those that raise animals and grow crops, can generate emissions of gases and particulate matter. For example, animals confined to a barn or restricted area (rather than field grazing), produce large amounts of manure. Manure emits various gases, particularly ammonia into the air. This ammonia can be emitted from the animal houses, manure storage areas, or from the land after the manure is applied. In crop production, the misapplication of fertilizers, herbicides, and pesticides can potentially result in aerial drift of these materials and harm may be caused. Natural Sources Although industrialization and the use of motor vehicles are overwhelmingly the most significant contributors to air pollution, there are important natural sources of â€Å"pollution† as well. Wildland fires, dust storms, and volcanic activity also contribute gases and particulates to our atmosphere. Unlike the above mentioned sources of air pollution, natural â€Å"air pollution† is not caused by people or their activities. An erupting volcano emits particulate matter and gases; forest and prairie fires can emit large quantities of â€Å"pollutants†; plants and trees naturally emit VOCs which are oxidized and form aerosols that can cause a natural blue haze; and dust storms can create large amounts of particulate matter. Wild animals in their natural habitat are also considered natural sources of â€Å"pollution†. The National Park Service recognizes that each of these sources emits gases and particulate matter into the atmosphere but we regard these as constituents resulting from natural processes. Air Pollution at Shenandoah Sources of air pollution that affect Shenandoah National Park are largely outside of the park. These include industrial facilities located throughout the mid-Atlantic region and the Ohio River Valley as well as urban centers in this same region. Because most areas adjacent to the park are rural and agricultural, it is clear that transport of pollutants from distant  locations is an important element upon which park air quality hinges. Even some agricultural activities, such as ammonia from the poultry industry and pesticides that are applied to adjacent fields, may contribute to air pollution in the park. In-park emission sources are relatively small, but do include motor vehicles, maintenance equipment, small boilers and generators. The relative contribution from the in-park sources is very small compared to other sources. In a July 2002 report describing an emissions inventory for Shenandoah National Park, it was determined that less than 1% of emissions were produced from in-par k sources. How does air pollution move? Air transport is the term used to describe the mechanism by which air pollution moves from an emissions source to a receptor. A source is a location (i.e., smokestack, chimney, exhaust pipe) from which the pollutant emanates and a receptor is the place (i.e., soil, vegetation, waterbodies, human lungs) where the pollutant is deposited. The atmosphere itself is the transporter of pollutants from sources to receptors. If the wind carries the plume of pollution high enough in the air, it may travel for hundreds of miles before being brought to earth. This is known as long-range or long-distance transport. Air Pollution Effects The air is an important component of the natural system of a park in its own right. The presence of pollution in the atmosphere results directly in air quality degradation. Air pollution is also a critical factor affecting the quality of other environmental resources as well as the human-made structures and facilities in the area. Polluted air can and has harmed park resources in a variety of ways depending upon the chemistry of the pollutant, weather and environmental conditions, and the nature or sensitivity of park resources. Examples of this harm include vegetative discoloration and growth disruption from ozone, loss of aquatic species from stream acidification, shifts in nutrient availability from acid deposition, and erosion of building surfaces and rock formations. Air pollution impairs visibility and contributes to climate change. Air pollution can also be detrimental to human health. Shchooltoday Your Cool Facts and Tips on Air Pollution What causes air pollution? Air pollution can result from both human and natural actions. Natural events that pollute the air include forest fires, volcanic eruptions, wind erosion, pollen dispersal, evaporation of organic compounds and natural radioactivity. Pollution from natural occurrences are not very often. Human activities that result in air pollution include: 1. Emissions from industries and manufacturing activities Have you seen a manufacturing company before? You will notice that there are long tubes (called chimneys) erected high into the air, with lots of smoke and fumes coming out of it. Waste incinerators, manufacturing industries and power plants emit high levels of carbon monoxide, organic compounds, and chemicals into the air. This happens almost everywhere that people live. Petroleum refineries also release lots of hydrocarbons into the air. 2. Burning Fossil Fuels After the industrial age, transportation has become a key part of our lives. Cars and heavy duty trucks, trains, shipping vessels and airplanes all burn lots of fossil fuels to work. Emissions from automobile engines contain both primary and secondary pollutants. This is a major cause of pollution, and one that is very difficult to manage. This is because humans rely heavily on vehicles and engines for transporting people, good and services. Fumes from car exhauts contain dangerous gases such as carbon monoxide, oxides of nitrogen, hydrocarbons and particulates. On their own, they cause great harm to people who breath them. Additionally, they react with environmental gases to create further toxic gases. Click here to see the effects 3. Household and Farming Chemicals Crop dusting, fumigating homes, household cleaning products or painting supplies, over the counter insect/pest killers, fertilizer dust emit harmful chemicals into the air and cause pollution. In many case, when we use these chemicals at home or offices with no or little ventilation, we may fall ill if we breathe them. What are the common air pollutants around? Carbon Monoxide (CO) Fuel combustion from vehicles and engines. Reduces the amount of oxygen reaching the body’s organs and tissues; aggravates heart disease, resulting in chest pain and other symptoms. Ground-level Ozone (O3)  Secondary pollutant formed by chemical reaction of volatile organic compounds (VOCs) and NOx in the presence of sunlight. Decreases lung function and causes respiratory symptoms, such as coughing and shortness of breath, and also makes asthma and other lung diseases get worse. More on Ground Level Ozone Here Lead (Pb) Smelters (metal refineries) and other metal industries; combustion of leaded gasoline in piston engine aircraft; waste incinerators (waste burners), and battery manufacturing. Damages the developing nervous system, resulting in IQ loss and impacts on learning, memory, and behavior in children. Cardiovascular and renal effects in adults and early effects related to anaemia. Nitrogen Dioxide (NO2) Fuel combustion (electric utilities, big industrial boilers, vehicles) and wood burning. Worsens lung diseases leading to respiratory symptoms, increased susceptibility to respiratory infection. Particulate Matter (PM) This is formed through chemical reactions, fuel combustion (e.g., burning coal, wood, diesel), industrial processes, farming (plowing, field burning), and unpaved roads or during road constructions. Short-term exposures can worsen heart or lung diseases and cause respiratory problems. Long-term exposures can cause heart or lung disease and sometimes premature deaths. Sulfur Dioxide (SO2) SO2 come from fuel combustion (especially high-sulfur coal); electric utilities and industrial processes as well as and natural occurances like volcanoes. Aggravates asthma and makes breathing difficult.It also contributes to particle formation with associated health effects. What are the effects of air pollution? Acidification: Chemical reactions involving air pollutants can create acidic compounds which can cause harm to vegetation and buildings. Sometimes, when an air pollutant, such as sulfuric acid combines with the water droplets that make up clouds, the water droplets become acidic, forming acid rain. When acid rain falls over an area, it can kill trees and harm animals, fish, and other wildlife. Acid rain destroys the leaves of plants. When acid rain infiltrates into soils, it changes the chemistry of the soil making it unfit for many living things that rely on soil as a habitat or for nutrition. Acid rain also changes the chemistry of the lakes and streams that the rainwater flows into, harming fish and other aquatic life. Eutrophication: Rain can carry and deposit the Nitrogen in some pollutants on rivers and soils. This will adversely affect the nutrients in the soil and water bodies. This can result in algae growth in lakes and water bodies, and make conditions for other living organism harmful. Ground-level ozone: Chemical reactions involving air pollutants create a poisonous gas ozone (O3). Gas Ozone can affect people’s health and can damage vegetation types and some animal life too. Particulate matter:  Air pollutants can be in the form of particulate matter which can be very harmful to our health. The level of effect usually depends on the length of time of exposure, as well the kind and concentration of chemicals and particles exposed to. Short-term effects include irritation to the eyes, nose and throat, and upper respiratory infections such as bronchitis and  pneumonia. Others include headaches, nausea, and allergic reactions. Short-term air pollution can aggravate the medical conditions of individuals with asthma and emphysema. Long-term health effects can include chronic respiratory disease, lung cancer, heart disease, and even damage to the brain, nerves, liver, or kidneys. Continual exposure to air pollution affects the lungs of growing children and may aggravate or compli cate medical conditions in the elderly. Air pollution prevention, monitoring and solution. Solution efforts on pollution is always a big problem. This is why prevention interventions are always a better way of controlling air pollution. These prevention methods can either come from government (laws) or by individual actions. In many big cities, monitoring equipment have been installed at many points in the city. Authorities read them regularly to check the quality of air. Let’s see more below: Government (or community) level prevention Governments throughout the world have already taken action against air pollution by introducing green energy. Some governments are investing in wind energy and solar energy, as well as other renewable energy, to minimize burning of fossil fuels, which cause heavy air pollution. Governments are also forcing companies to be more responsible with their manufacturing activities, so that even though they still cause pollution, they are a lot controlled. Companies are also building more energy efficient cars, which pollute less than before. Individual Level Prevention Encourage your family to use the bus, train or bike when commuting. If we all do this, there will be less cars on road and less fumes. Use energy (light, water, boiler, kettle and fire woods) wisely. This is because lots of fossil fuels are burned to generate electricity, and so if we can cut down the use, we will also cut down the amount of pollution we create. Recycle and re-use things. This will minimize the dependence of producing new things. Remember manufacturing industries create a lot of pollution, so if we can re-use things like shopping plastic bags, clothing, paper and bottles, it can help. Basic Air Pollution Facts Below are some random facts and info on environmental pollution. Air pollutants (dangerous things that make the air unclean)come in the form of gases or particles. In March 2011, a very powerful earthquake in the sea (tsunami) hit the Japan coast. The sea level rose and water came into the land, damaging 4 of the 6 reactors in the Fukushima Daiichi Nuclear Power Plant. World Health Organisation (WHO) experts confirm that there is slight increased risk of some cancer types for some people who were exposed to the radiation. These included people living in that area and some workers at the plant. Below is a peice of the information given on BBC website: â€Å"The biggest lifetime risks were seen in those exposed as infants, compared with children or adults. For girls exposed to radiation from the accident as infants, the report found a 4% increase above the lifetime expected risk of solid tumours and a 6% increase above that expected for breast cancer. Boys exposed as infants are expected to have a 7% increased risk of leukaemia above that expected in the normal population. The biggest risk was seen in thyroid cancer, which for infant girls could be up to 70% higher than expected over their lifetime.† BBC Website: /news/health-21614722 It is estimated that you breathe 20,000 liters of air each day. This means the more polluted the air is, the more we breathe into our lungs dangerous chemicals. Air can be polluted both indoors and outdoors. Tobacco and other kinds of smoking are examples of indoor air pollution. Sick Building Syndrome is a health condition related to pesticides, insecticides and chemicals we use at home and offices. In the great â€Å"Smog Disaster† in London in 1952, four thousand people died in a few days due to the high concentrations of pollution. Air pollution affects kids more than adults  because, for their body size, kids breathe more air and spend more time playing outside. More hazardous pollutants are discharged into the air each year than are released to surface water, ground water, and land, combined. Motor vehicles produce more air pollution than any other single human activity. One full commuter bus can mean 40 less cars going through your neighborhood. In America, vehicle exhaust contributes roughly 60% of all carbon monoxide emissions nationwide, and up to 95% in cities. Indoor air pollution and health Around 3 billion people cook and heat their homes using open fires and leaky stoves burning biomass (wood, animal dung and crop waste) and coal. Nearly 2 million people die prematurely from illness attributable to indoor air pollution from household solid fuel use. Nearly 50% of pneumonia deaths among children under five are due to particulate matter inhaled from indoor air pollution. More than 1 million people a year die from chronic obstructive respiratory disease (COPD) that develop due to exposure to such indoor air pollution. Both women and men exposed to heavy indoor smoke are 2-3 times more likely to develop COPD Source: WHO Ozone Depletion: Losing Earth’s Protective Layer National Geographic The ozone layer is a belt of naturally occurring ozone gas that sits 9.3 to 18.6 miles (15 to 30 kilometers) above Earth and serves as a shield from the harmful ultraviolet B radiation emitted by the sun. Ozone is a highly reactive molecule that contains three oxygen atoms. It is constantly being formed and broken down in the high atmosphere, 6.2 to 31 miles (10 to 50 kilometers) above Earth, in the region called the stratosphere. Today, there is widespread concern that the ozone layer is deteriorating due to the release of pollution containing the chemicals chlorine and bromine. Such deterioration allows large amounts of ultraviolet B rays to reach Earth, which can cause skin cancer and cataracts in humans and harm animals as  well. Extra ultraviolet B radiation reaching Earth also inhibits the reproductive cycle of phytoplankton, single-celled organisms such as algae that make up the bottom rung of the food chain. Biologists fear that reductions in phytoplankton populations will in turn lower the populations of other animals. Researchers also have documented changes in the reproductive rates of young fish, shrimp, and crabs as well as frogs and salamanders exposed to excess ultraviolet B. Chlorofluorocarbons (CFCs), chemicals found mainly in spray aerosols heavily used by industrialized nations for much of the past 50 years, are the primary culprits in ozone layer breakdown. When CFCs reach the upper atmosphere, they are exposed to ultraviolet rays, which causes them to break down into substances that include chlorine. The chlorine reacts with the oxygen atoms in ozone and rips apart the ozone molecule. One atom of chlorine can destroy more than a hundred thousand ozone molecules, according to the the U.S. Environmental Protection Agency. The ozone layer above the Antarctic has been particularly impacted by pollution since the mid-1980s. This region’s low temperatures speed up the conversion of CFCs to chlorine. In the southern spring and summer, when the sun shines for long periods of the day, chlorine reacts with ultraviolet rays, destroying ozone on a massive scale, up to 65 percent. This is what some people erroneously refer to as the â€Å"ozone hole.† In other regions, the ozone layer has deteriorated by about 20 percent. About 90 percent of CFCs currently in the atmosphere were emitted by industrialized countries in the Northern Hemisphere, including the United States and Europe. These countries banned CFCs by 1996, and the amount of chlorine in the atmosphere is falling now. But scientists estimate it will take another 50 years for chlorine levels to return to their natural levels. Clean Air Kids The Earth is wrapped in a blanket of air called the ‘atmosphere’, which is made up of several layers. About 19-30 kilometres above the Earth is a layer of gas called ozone, which is a form of oxygen. Ozone is produced naturally in the atmosphere. WHY DO WE HAVE AN OZONE LAYER? The ozone layer is very important because it stops too many of the sun’s ‘ultra-violet rays’ (UV rays) getting through to the Earth – these are the rays that cause our skin to tan. Too much UV can cause skin cancer and will also harm all plants and animals. Life on Earth could not exist without the protective shield of the ozone layer. WHAT IS THE OZONE HOLE? Every spring, a hole as big as the USA develops in the ozone layer over Antarctica, in the South Pole. A smaller hole develops each year over the Arctic, at the North Pole. And there are signs that the ozone layer is getting thinner all over the planet. Scientists have discovered that the ozone hole over Antarctica started in 1979, and that the ozone layer generally started to get thin in the early 1980s. The loss of the ozone layer occurs when more ozone is being destroyed than nature is creating. WHAT CAUSES THE OZONE HOLE? One group of gases is particularly likely to damage the ozone layer. These gases are called CFCs, Chloro-Fluoro-Carbons. CFCs are used in some spray cans to force the contents out of the can. They are also used in refrigerators, air conditioning systems and some fire extinguishers. They are used because they are not poisonous and do not catch fire. Most countries have now stopped using new CFCs that can be released into the atmosphere, but many scientists believe we must stop using old ones as well. THE OZONE HOLE AND OUR HEALTH The ozone layer is like a sunscreen, and a thinning of it would mean that more ultra-violet rays would be reaching us. Too many UV rays would cause more sunburn, and because sunburn causes skin cancer, this too would increase deaths. These UV rays are also dangerous for our eyes and could cause an increase in people becoming blind. That is why sun cream and sunglasses are very important. THE OZONE HOLE ON ANIMALS AND PLANTS UV rays can go through water and end up killing small water animals or  plants, called ‘plankton’ which form the base of the food chain in oceans and seas. Whales and other fishes have plankton as their main food, and if plankton die because of these UV rays, whales will start dying too, because they will not have anything to eat. Large amounts of UV rays could damage all green plants. If the ozone layer keeps getting thinner, there could be fewer and fewer plants on Earth, then there would be less food in the whole world. THE TWO-FACED OZONE GAS Ozone found between 19 and 30 kilometres high in the atmosphere is one of the reasons why we are alive on Earth. But when the gas ozone is found lower down where we can breathe it in, it becomes very dangerous for our health. This ozone is caused by a reaction between air pollution and sunlight and can cause modern-day smog. This is different to the smog that formed in the early 20th century from smoke and fog. What can you do: There are many things we can do to help reduce air pollution and global warming. Use buses and trains instead of cars, as they can carry a lot more people in one journey. This cuts down the amount of pollution produced. Walking or cycling whenever you can will be even better, as it does not create any pollution. It will also be good for your body, as regular exercise will keep you fit and healthy. If your parents must use the car, ask them to avoid using it for very short journeys if possible, as this creates unnecessary pollution. Try to encourage them to share their journeys with other people, for example when they go to work or go shopping. Also encourage them to drive more slowly as this produces less pollution and less carbon dioxide. Energy is produced to generate electricity and to keep us warm. Most energy is produced by the burning of fossil fuels, like coal, oil and gas, which release carbon dioxide, a greenhouse gas. Fuel burnt in our cars also releases carbon dioxide. As an individual, you do not have a lot of control on how your energy is produced. However, you can control the way in which you use that energy. Using less energy means less of it needs to be produced. So less carbon dioxide is released into the atmosphere. We can also help prevent pollution from our own homes which may contribute to acid rain and poor air quality, and increases emissions of carbon dioxide in the  atmosphere. Turning off lights when they are not needed and not wasting electricity will reduce the demand for energy. Less electricity will need to be produced and so less coal, oil and gas will have to be burnt in power stations, which means less air pollution and less carbon dioxide! Pollution formed indoors can be reduced by ensuring that all gas appliances are working correctly. Good ventilation will improve indoor air quality by dispersing biological pollutants like dust mite, and other pollutants such as cigarette smoke. Most of the rubbish we throw away can be recycled, such as glass bottles and jars, steel and aluminium cans, plastic bottles and waste paper. Recycling used materials uses less energy than making new ones. Composting fruit and vegetable waste reduces the amount of rubbish buried at rubbish dumps. What are the Governments doing? Governments throughout the world have already taken action for these different environmental problems (i.e. Acid Rain, Air Quality, Ozone Hole, Global Warming). In their plans they hope to reduce the amount of emissions of greenhouse gases produced by man. About half of the greenhouse effect is caused by our use of energy, especially from fossil fuels. Other sources of energy could be used which do not emit carbon dioxide, e.g. wind power, solar (sun power) and wave power. In the home and at school, we must learn to use energy efficiently and not waste it. Rain is very important for life. All living things need water to live, even people. Rain brings us the water we need. But in many places in the world even where you live, rain has become a menace. Because of pollution in the air, acid gases from factories, cars and homes, the rain is becoming dangerous for the life of every living creature. This rain is known as ‘acid rain’. WHAT IS ACID RAIN? Acid gases are produced when fossil fuels like coal and oil are burned in power stations, factories and in our own homes. Most of these acid gases are blown into the sky, and when they mix with the clouds it can cause rain – or snow, sleet, fog, mist or hail – to become more acidic. The opposites of  acid are alkalis; for example, toothpaste and baking powder are both alkalis. Strong alkalis can also be dangerous, such as ammonia and bleach. Lemon juice, vinegar and cola are all acidic. Rain is naturally acidic, but acid gases make it even more acidic, sometimes as acid as lemon! Nature can also produce acid gases, such as volcanoes. When they erupt, the smoke that comes out of the crater is also full of acid gases. HOW DO WE MEASURE ACIDITY? There is a special scale called the pH scale that measures the strength of acids and alkalis. A low pH number means something is acid. A high number means something is alkali. And something in the middle is called neutral. Acidity can be tested using litmus paper. Usually rain is a little acidic, and has pH of about 5.5, if the pH of rainfall is less than 5.5, then the rain is probably polluted by acid gases. Acids turn litmus paper red, and alkalis turn it blue. With a special paper called universal indicator, you can test levels of acidity. WHAT ARE THE MAIN GASES THAT CAUSE ACID RAIN? When we burn fuels, chemicals called ‘sulphur’ and ‘nitrogen’ are released into the air. Once in the air, they mix with water in the air – rain, snow, etc – and are transformed into different chemicals called ‘sulphur dioxide’ and ‘nitrogen oxides’, which can be very dangerous for plants, animals and people. Most of the ‘sulphur’ comes from power stations, which make electricity, and also from volcanoes. Most of the ‘nitrogen oxides’ come from car and truck exhausts. We call ‘air pollution’ the bad gases that we produce and release in the air. ‘Sulphur dioxide’ and ‘nitrogen oxides’ are the most important causes of acid rain. A PROBLEM ALL OVER THE WORLD Air pollution can be carried over long distances. When acid gases are released, they go high up in the sky, and then they are pushed by strong winds towards other countries. The acid rain in Sweden is caused by air pollution in Britain and other countries of Europe. The pollution produced in Britain ends up mostly in Scandinavia – countries in northern Europe  including Sweden, Norway and Denmark. In the USA, the winds blow the air pollution to certain areas in Canada. HOW BAD IS ACID RAIN? When rain is acidic, it affects what it falls on: trees, lakes, buildings and farmland. Sometimes rain is not very acidic and does not cause a lot of problems, but when it is acidic, it can be very harmful to the environment. TREES AND PLANTS Acid rain can have terrible effects on a forest. The acid takes away important minerals from the leaves and the soil. Minerals are like vitamins for trees and plants. Without them, trees and plants cannot grow properly. They lose their leaves and become very weak. They are no longer strong enough to fight against illnesses and frost. They become very ill and can even die. Some soils are alkaline, when acid rain falls on them the acid becomes neutral. Plants and trees living on these soils are not in any big danger.. LAKES AND WATER LIFE Acid rain has a terrible effect on water life. Even if the acid rain does not fall straight into the lake, for example, it may enter from rivers and streams. Some of the life in the lake such as fish and plants may end up dying, because they cannot survive in acidic lakes. Thousands of lakes in Scandinavia have no more life in them. They have received so much acid rain for so many years, because of the winds pushing the acid gases, that nothing can survive. You can recognise a lake dead from acid rain by its clean and crystal clear water. But they look clean because there is very little living in them anymore. Tiny plants and animals are mostly unable to survive.. OUR HEALTH Particulates – very small particles of debris found in some of the air pollution – are one of the main causes of health problems. In towns and cities, these are released mainly by diesel engines from cars and trucks. When we breathe in air pollution, these very fine particulates can easily enter our body, where they can cause breathing problems, and over time even  cause cancer. Water we drink from taps can be contaminated by acid rain, which can damage the brain.. BUILDINGS Acid rain can also ruin buildings because the acid eats into metal and stone. It also damages stained glass and plastics. Some types of building materials are softer than others, and it is the softer ones which are most affected by acid rain. Sandstone and limestone are examples of stone which are fairly soft and are damaged easily. Granite is an example of a harder stone that can resist the effects of acid rain. In many places in the world, ancient and famous buildings and monuments are affected by acid rain. For example, the Statue of Liberty in New York, USA, has had to be restored because of acid rain damage. Buildings are naturally eroded by rain, wind, frost and the sun, but when acidic gases are present, it speeds up the erosion.