But since then, a new source of lead pollution - factories that produce lead-acid batteries for electric bikes, motorcycles and cars - has emerged with a vengeance.

但是从那时起，生产铅酸蓄电池的工厂成为新的铅污染来源，这成了巨大的讽刺。

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Heavy metal pollution, including lead, zinc, and cooper may be caused by corrosion of the very pipes that carry water from its source to the consumer.

重金属污染，包括铅、锌和铜的污染可能正是由于把水从水源输送到用户的管道本身的腐蚀而引起的。

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Soil phosphorus as agricultural non-point source pollution is one of the main factors which lead to water pollution.

土壤磷素的农业非点源污染是导致水体污染的最主要的原因之一。

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At the time, he cited findings from a Shanghai testing firm that determined that Johnson Controls had abided by local laws and wasn't the source of the local lead pollution.

WSJ: Shanghai Halts Johnson Controls Lead Processing

These bills will curb lead levels in water pipes, a major source of harmful lead exposure for children, and help address diesel engine pollution that is linked to serious health conditions like asthma and heart and lung disease.

WHITEHOUSE: Council on Environmental Quality Blog