Globally, artisanal and small-scale gold mining is the largest source of man-made mercury emissions, followed closely by coal combustion. Other large sources include non-ferrous metals production and cement production (United Nations Environment Programme, Global Mercury Assessment, 2013).
When it comes to protecting communal resources like air, water, forests and wildlife, we often realize quickly that many problems cannot be solved entirely at a local level, though it’s important for us all to do our part. Like the smoke from a wildfire, air and water move without regard for our borders and lines.
https://stillwatergazette.com/2015/07/11/column-air-and-water-dont-follow-political-boundaries/
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