Mercury pollution comes from a variety of industrial processes such as gold mining or electronics manufacturing. The U.S. has significantly reduced mercury emissions over the past several decades. “Mostly unintentionally,” Holmes says, as laws meant to reduce different types of pollution have had the side effect of reducing mercury too.
But no matter how much we reduce current emissions, mercury already in our atmosphere, waterways, and soils, isn’t going anywhere, and there’s no good way to clean it up.
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