当前对水体危害较大的是人为污染。

At present a greater hazard to the water body is man-made pollution.

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对城市面源污染物的种类、来源和危害，以及对受纳水体的影响两方面综合进行分析；

The type, source and harm of pollutants of urban non-point source pollution and its influence on the receiving water are analyzed.

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本文讨论了工业废水中常见的微量元素及其对人体健康的危害，着重讨论了汞、镉、砷、氟、铅等元素对水体的污染及对人体健康的危害。

The usual microelements in industrial sewage such as Hg. Cd. As. F. Pb. etc. and the harm to human health were investigated in this paper.

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