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The leading source of mercury is pollution from coal-burning power plants, which accounts for 40% of all domestic anthropogenic mercury, according to the EPA.

据环保局统计，汞的主要来源是占国内人为排汞量40%的燃煤电厂污染物。

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Cement plants are America's fourth-largest source of airborne mercury, generating about 23, 000 pounds (10, 400 kilograms) a year, EPA says.

环境署称，水泥工厂是美国空气中汞污染物的第四大来源，每年产生约23000磅（10400公斤）的汞污染物。

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In particular, coal plants are the largest source of mercury pollution in the Great Lakes.

WHITEHOUSE: Energy and Environment Latest News | The White House

Too much mercury in one's diet from any source can cause loss of coordination, blindness or even death.

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