... lead pollution sources 铅污染源 lead-zinc pollution 铅锌污染 cadmium and lead pollution 镉铅污染 ...
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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。
Local officials have promised that the smelter, which produces lead and zinc, will not reopen until it meets pollution standards.
当地官方承诺，排放铅和锌的该冶炼厂在达到污染排放标准之前不会重新开工。
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