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  3. Write a composition on the topic "Air Pollution." Start writing your composition with the topic sentence: "There is obviously a

Write a composition on the topic "Air Pollution." Start writing your composition with the topic sentence: "There is obviously a

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问题     Write a composition on the topic "Air Pollution." Start writing your composition with the topic sentence: "There is obviously a very serious problem of pollution in our cities nowadays." You are supposed to write at least 100 words in your composition using the words and expressions given below.
    cause     reduce     control      deal with      waste disposal     cleaner fuel
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答案 Air Pollution There is obviously a very serious problem of pollution in our cities nowadays. In this short article, we shall discuss two problems: the cause of air pollution, and possible ways of reducing or controlling it. The first question then is: What cause air pollution? in a typical city there are five main sources of air pollution: waste disposal, which is the least important, heating, power plants, industry, and cars, which alone cause 60% of air pollution in most large cities. The next problem is, therefore, how to control or reduce air pollution. It seems that we should deal with cars first. There are four main ways of reducing the pollution caused by cars. First, we can try to persuade people to use car less. For example, we can make cars more expensive. Second, we can try to use other forms of transport, such as buses. Third, we can use a different and cleaner fuel for cars, such as electricity and gas. Finally, we can try to invent new kinds of engines.
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