Metal pollution and mine acid water produced in the mining and mineral processing of metal mines have become two major public dangers to environment.

金属矿采选产生的金属污染、矿山酸性废水已成为两大环境公害。

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The results revealed that copper pollution and strong acid were the major problems of this mine land.

研究表明，铜污染和强酸性是该矿山土地的最主要问题。

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Studies also show that most of mercury in coal can be brought into the environment easily by acid mine drainage (AMD), and this kind of pollution should be paid more attention to.

研究表明，当煤炭被开采堆放到地表后，煤中大部分汞可以被酸性矿井水带入环境中，这一环境污染问题应予以重视。

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