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Oct 30, 2009

Mercury levels peaked in 1970s

Although it's commonly believed that manmade emissions of mercury over the last century have disrupted the global mercury cycle, the first continuous monitoring of mercury levels only began during the 1990s, in Europe and the Arctic. Now a team from France, the US and Italy has produced the first continuous record of gaseous elemental mercury in the boreal atmosphere for the last 70 years, by studying air from inside a perennial snowpack, or firn, in Greenland.

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