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英语翻译Recently,scientists have become increasingly concerned a

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英语翻译
Recently,scientists have become increasingly concerned about pollution and its effects on weather.Actually,man's pollution of the atmosphere is not nearly as great as nature's,In fact,man is the less offender compared to nature itself.Specifically,active volcanoes,evaporation of impure water,and wind erosion of the landscape spew 8.5 billion tons of chemicals into space each year.Man's contribution consists of a mere half billion tons.What man contributes,though,is unable to escape very far into the atmosphere.
近来,科学家越来越关注污染及其对天气的影响.其实,人类对大气的污染并不如大自然本身造成的污染严重.事实上,与大自然本身相比,人类的“污染罪责”要轻得多.具体说,活火山、不洁水体的蒸发以及风对自然景观的侵蚀每年要向大气层排放85亿吨之多的化学物质.而人类的排放总量只不过区区5亿吨而已.不过,人类排放的物质是不可能发散到大气层深处的.
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