Презентация по теме "Переработка отходов"
презентация к уроку по английскому языку (8 класс) на тему

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You can break up old cars to get the metal, or make new glass from old bottles. Some waste is not dangerous. Often somebody will recycle it and do something useful with it.

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But some waste is toxic – it is very poisonous. In the USA, for example, factories dump – throw away – 265 million tonnes of toxic waste every year. How do you dump toxic waste safely?

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You can put it in metal containers and leave it somewhere safe. You can bury toxic waste. You put it in a deep hole and cover it with soil. But this can be very bad idea Because the waste will start to come through the metal of the containers and pollute the ground.

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You can burn toxic waste, but it is more expensive than burying it, and the burning can produce dangerous gases. So some people burn their toxic waste at sea in special ships. The chemicals get into the air and the wind carries them a long way.

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You can send your toxic waste to a poorer country and pay somebody to burn or bury it there. Is this a good idea?

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Toxic waste can be useful if you know how to recycle it. Some petrol producers bury their toxic waste in the soil. There, special bacteria in the soil eat the waste and change it into clean, safe carbon dioxide and water.

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In Britain, some people are growing special waste-eating bacteria. These bacteria eat toxic chemicals. There is a lot of toxic waste in the world : are these bacteria hungry enough?