Mercury is a heavy metal that is widespread and persistent in the environment. As a natural occurring element, it can be released into the air and water through the weathering of rock containing mercury ore or through human activities such as industrial processes, mining, deforestation, and water incineration and the burning of fossil fuels. It can also be released from a number of mercury containing products such as dental amalgam, electrical appliances (such as switches and fluorescent lamps) laboratory and medical instruments (such as clinical thermometers and barometers), batteries, seed dressings, antiseptic and antibacterial creams and skin-lightening creams.
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