A miner melts an amalgam of gold and mercury to burn off the mercury. This rudimentary process of extracting the gold from the amalgam releases mercury vapors, posing a danger to the miners and adding to the contamination that is resulting in the deforestation of thousands of acres of the Amazon rainforest.
http://stream.wsj.com/story/latest-headlines/SS-2-63399/SS-2-535613/
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