2. 外语
  3. There are several main types of【B1】______and well-known effects of pollution which are commonly【B2】______. These include smog, a

There are several main types of【B1】______and well-known effects of pollution which are commonly【B2】______. These include smog, a

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问题    There are several main types of【B1】______and well-known effects of pollution which are commonly【B2】______. These include smog, acid rain, the【B3】______effect, and "holes" in the ozone layer. Each of these problems has serious【B4】______for our health and well-being as well as for the whole【B5】______.  
【B5】
There are several main types of pollution and well-known effects of pollution which are commonly discussed. These include smog, acid rain, the greenhouse effect, and "holes"in the ozone layer. Each of these problems has serious implications for our health and well-being as well as for the whole environment.
选项
答案environment
解析 whole environment：整个环境。后两句的意思：每个问题对整个环境以及我们的健康、幸福都有严重的影响。
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