Toxic mercury, accumulating in the Arctic, springs from a hidden source: Boston MA (SPX) May 24, 2012
Environmental scientists at Harvard have discovered that the Arctic accumulation of mercury, a toxic element, is caused by both atmospheric forces and the flow of circumpolar rivers that carry the element north into the Arctic Ocean. While the atmospheric source was previously recognized, it now appears that twice as much mercury actually comes from the rivers.
The revelation implies that
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