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空气污染 水污染 大气污染的介绍(英文)幻灯片

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WATER POLLUTIONРWater pollution occurs when a body of water is adversely affected due to the addition of large amounts of materials to the water.?水污染是水体中添加大量其他物质而造成的负面影响РDroughtРPollutionРApproximately 300 million nationwide have no access to clean water. Furthermore, over 700 million Chinese drink fetid water below World anization standards. Almost 90% of underground water in cities is affected by pollution and 80% of China’s rivers fail to meet standards for fishing. Almost all of the nation's rivers are considered polluted to some degree and half of the population lacks access to clean drinking water. y percent of urban water bodies are severely polluted.Р 全国约有3亿人使用不上干净的水,此外,有超过7亿中国人饮用的水没能达到世界卫生组织的标准,几乎 90%的城市地下水受到污染,80%的中国河流不符合捕鱼标准,某种程度上说,几乎所有的河流都受到某种程度的污染,一半的人口缺少干净的饮用水,90%的城市水体受到严重污染。

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