Mining has polluted mountain streams in about 40% of the western U.S. watersheds and accounts for 50% of all the country's emissions of toxic chemicals.

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According to a report by the Environmental Protection Agency (EPA), mining has polluted mountain streams in about 40% of the western U.S. watersheds and accounts for 50% of all the country's emissions of toxic chemicals.

Mining Has Polluted Mountain Streams in About 40% of the Western