The harmfulness of aluminium industrial residue deposit on environment mainly lies in its pollution of underground water and surface water.

铝工业废渣堆场对环境的危害主要表现在对地下水及地表水体的污染，其主要污染物为碱、氟化物、铝及钠等。

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MTBE has been the most widespread additives in the present market, but it will quit this stage soon because of its pollution to underground water.

目前市场应用最广的是甲基叔丁基醚(MTBE)。由于其对地下水有污染，将逐渐退出燃料添加剂市场。

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The natural degradation speed of the pollution of chemical pollutants in the soil is very slow under a natural condition, so a long-time pollution source to underground water is formed.

土壤中的化学污染物在自然条件下污染自然降解速度非常缓慢，形成对地下水的长期污染源。

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Industrial and biological pollution has contaminated almost 90 percent of the underground water in Chinese cities.

FORBES: Quenching China's Thirst For Water

Meanwhile, industrial and biological pollution has contaminated almost 90 percent of the underground water in Chinese cities.

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Intensive development of agriculture and industry may become a reason of deterioration of underground water in various regions in the absence of water-protective measures which can prevent its pollution.

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