This paper arsenic and mercury two heavy metal pollution and its source of food, for the harm to human body and detection method is introduced and understanding.
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含有的铅、镉、汞等重金属的电池一旦泄漏进入水源或产生有害气体进入大气，将对环境产生危害。
Batteries contain heavy metals such as lead, cadmium and mercury that can be harmful if they leak into water supplies or eventually produce noxious gases which enter the atmosphere.
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