Coal-fired power plants have been the main source of mercury pollution in the U.S. and the world. Gold mining, some metal-smelting operations and chemical plants that manufacture chlorine release lesser amounts of mercury. Volcanic eruptions and natural erosion of rocky surfaces account for a small percent of mercury release. Forest fires also release mercury into the air.
read more... https://www.timesfreepress.com/news/opinion/columns/story/2019/jan/13/cleaveland-mercury-pollution-persistent-dange/486426/
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