The only question mark is now where the mercury is coming from – and the scientific evidence seems to indicate we are doing it. Coal plants are the main source of pollution, closely followed by cement kilns. Other sources are trash burning and gold mining. We need to find better ways to deal with our mercury pollution, and that’s exactly the aim of the new United Nations Environment Programme’s Minamata Convention on Mercury .
http://www.zmescience.com/ecology/pollution-ecology/mercury-levels-tuna-18022015/
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