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  3. [audioFiles]audio_ezf_m_0156(20101)[/audioFiles] The effects of acid rain c

[audioFiles]audio_ezf_m_0156(20101)[/audioFiles] The effects of acid rain c

游客2023-11-12  31
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答案      The effects of acid rain can be devastating to many forms of life, including human life. Its effects can be most vividly seen, however, in lakes, rivers, and streams and on vegetation. Acidity in water kills virtually all life forms. By the early 1990s tens of thousands of lakes had been destroyed by acid rain. The problem has been most severe in Norway, Sweden, and Canada. The threat posed by acid rain is not limited by geographic boundaries, for prevailing winds carry the pollutants around the globe. For example, much research supports the conclusion that pollution from coal-powered electric generating stations in the Midwestern United States is the ultimate cause of the severe acid-rain problem in eastern Canada and the northeastern United States.
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