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  3. People today all over the world are beginning to hear and learn more and more about the problem of pollution. (46) Pollution is

People today all over the world are beginning to hear and learn more and more about the problem of pollution. (46) Pollution is

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问题     People today all over the world are beginning to hear and learn more and more about the problem of pollution.  (46) Pollution is caused by either the release by man of completely new and often artificial substances into the environment, or by releasing greatly increased amounts of a natural substance, such as oil from oil tankers into the sea.
    (47)The whole industrial process which makes many of the goods and machines we need and use in our daily lives, is bound to create a number of waste products which upset the environmental balance, or the ecological balance as it is also known. (48) Many of these waste products can be prevented or disposed of sensibly, but clearly while more and more new goods are produced and made complex, there will be new, dangerous wastes to be disposed of, for example, the waste products from nuclear power stations.
    (49)Whatever its underlying reasons, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the home there is an obvious need to control litter and waste. Food comes wrapped up three or four times in packages that all have to be disposed of; drinks are increasingly sold in bottles or tins which cannot be reused. This not only causes a litter problem, but also is a great waste of resources, in terms of glass, metals and paper. Advertising helped this process by persuading many of us not only to buy things we neither want nor need, but also to throw away much of what we do buy. (50)Pollution and waste combine to be a problem every one can help to solve by cutting out unnecessary buying, excess consumption and careless disposal of the products we use in our daily lives.  
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答案我们每个人都可以通过少买不必要的东西，减少日常生活中的过度消费和随意乱扔物品，进而解决污染和浪费的问题。
解析 本句是一个复合句，主干为Pollution and waste combine to be a problem。其中，(that)every one can help to solve by cutting out unnecessary buying，excess consumption and careless disposal of the products为定语从句修饰problem，此从句省略了关系代词that；by cutting out...为此从句的状语，修饰help；of the products作定语修饰cutting out的三个宾语unnecessary buying。excess consumption and careless disposal。(that)we use in our daily lives为定语从句修饰products，此从句也省略了关系代词that。注意：这些从句虽然省略了关系代词，不好辨别，但是找出主干后，就会简单的多。
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