tugas bhs inggris presentasi

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    PLASTIC

    The first man made plastic was created by AlexanderParckes who publicly demonstrated it at the 1862 greatinternational exhibition in London. The material calledparlesine wasban organic material derived from cellulosethat once heated could be molded, and retained its shapewhen cooled.

    But at 1970 th people prefer to use garbage binsinstead of plastics.

    For one, we had far less garbage. Goods had muchless packaging than is the case today so we didnt fill ourbins as lucky. Peelings, eggshells, tea bags and coffeegrounds were all composted, as was any paper thatwasnt needed for lighting fires.

    What was left went into an unlined bin with anythingsloppy being wrapped in newspaper first.

    If we choose carefully when shopping so as not tobring home more packaging than necessary theresreally no point in bringing it home just to throw it straightin the bin when we unpack and keep a compost bingoing, the amount of waste that goes into the kitchen binwill be halved, at least.

    Now that we have re-cycling plants, even less willneed to be binned. Bins, bottles and paper (we generally

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    have too much for the compost heap these days) can allbe delivered to the local re-cycling point.

    If you really must line your bins, instead of buying

    plastics liners, its possible to use newspaper. You wontbe able to pull everything out, tie it out, of course, butyou will be able to tip it from your kitchen bin into themain bin without too much mess. People manage before;perhaps the comfortable life we have today just makeeverything appear more difficult than it really is.

    Obviously, if you live in area where the garbagecollectors except to fine bin liners neatly arranged alongthe edge of the street rather than the bins themselves,youll have to continue using plastic bags. That doesntmean to say you cant lobby your local authority forchange, though. Explain why you need to leave the binoutside and that its their duty to support any move thatwill improve the environment.

    And nowadays, who doesnt know about plastic?Everyone knows about plastic .in our daily life, we alwaysneed plastic. For example, sellers and buyers in marketsor department stores depend in plastic. If buyers dontuse plastic, they will have difficulties to carry their goods.Using plastic is increasing from years to years, but until

    now the government hasnt found the best solutions todecrease the use of plastics yet. Every person does notreally release them self from using plastic. Not onlycontain hazardous chemicals and destroys theenvironment, but plastics also increased global warming,so that we have to minimize using plastics.

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    Firstly, plastic contains hazardous chemicals whichcan cause much disease. Plastic contains PVC (PolyvinylChloride). PVC is a basic material of plastic and other

    substances such as steel and wood which bent easily.PVC can cause cancer and hormone disorder. PVC is ableto bend when it is heated. Consequently, it is dangerousif plastic is used to wrap food. Besides PVC, plasticcontains formalin. Have you ever bought meatballs whichare warm and then packed with transparent plastic? Orhave you ever bought warm fried food packed in plasticbag? Be careful! Because, formalin is also detected notonly in fish, noodle, meatball or tofu but, in Styrofoambox as well, that contains 5 ppm of formalin. Each ppmequals with milligram per kilogram materials. Formalin inplastic or Styrofoam is chemical substances which areinherently contained in resin or plastic materials.However, only in high temperature that poisonoussubstance will soak in food, such as when it is soaked byboiled water or hot oil. Because of that, we should not puthot food in the plastic/Styrofoam box directly.

    Secondly, plastic wastes also can damage thebalance of ecosystem. Most plastic are non-degradable,so most of them are thrown anywhere after being used.

    They can cause flood, landslide, and the death of some

    living creatures, such as dolphin. Many of them diedbecause of the plastic wastes they ate. The living rate of some sea creatures are also decreasing. Animals and seacreatures are hurt and killed everyday by discardedplastic bags a dead turtle with a plastic bag hanging

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    from its mouth isnt a pleasant sight but mistaking plasticbags for food is commonplace amongst marine animals.Plastic clogs their intestines and leads to slow starvation.

    Others become entangled in plastic bags and drown.

    Because plastic bags take hundreds of years tobreak down, every year our seas become home to moreand more bags that find their way there through oursewers and waterways. Every bag thats washed down adrain during rainfall ends up in the sea-every bag thatsflushed down a toilet (many small bags are), ends up insea-every bag thats blown into a river will most likelyend up in the sea. Add to the enormous amounts of energy thats used every year in order to manufacturethese bags and its no surprise that pressure is being puton governments to make changes and consumers to re-think their attitudes.

    Most of plastic wastes are dumped in an areawhich has already settled by the government. Eventhough the areas are quite capacious, its still unable tokeep all of the wastes. The citizen who live nearby,complain that the wastes reach their houses and cause

    bad smell and most of the citizen got digestion illnesssuch as, diarrhea and dysentery. Some people just burnplastic wastes to obliterate them, they dont know thatthe gas, produced by the plastic wastes may hamperchildren growth. Just imagine if every family burn its

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    plastic wastes. If we keep using plastic material, its undoubt that our next generation will suffer even more. Sowe should stop using plastic.

    Thirdly, the use of plastic can cause globalwarming. Global warming is the increasing temperaturein earths atmosphere thats caused by Greenhouseemission gas which cant go through the atmosphere.

    That emission gas prevents the reflections of sunraysradiation in the atmosphere; the other will be reflected toouter space. However, because of the emission gas inatmosphere, the radiation cant go through the earthsatmosphere, and its even reflected again to earth by theatmosphere. It makes the temperature of the atmosphereincreases incredibly. The increasing temperature cancause many serious problems. It can cause skin cancer tothem who often get bathed by the sun. There are alsomany forests which got fried in some regions. Manycountries try as soon as possible to prevent globalwarming. Because, if these situation still continue theforest which are the earths respiration sources will becompletely used up. This is what people always talkabout nowadays. If we dont prevent this thing, earth willget hotter and hotter, and we, the human beings willsuffer.

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    In conclusion the number of people using plasticalways increases. And we have to minimize using plasticsin order to reduce the effects of plastics, such as it can

    destroy our health, destroy the environment becauseplastic is difficult to re-cycle. Using plastic also increasesglobal plastic.

    So, until a real alternative is freely available, the onlysolution is a re-think of attitude:

    * re-use bags when shopping.

    * choose biodegradable bags.* re-use large sacks whenever possible.

    * refrigerate food in containers rather than plasticbags.

    Last but not least, we hope, we as students canminimize using plastic.