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Environmental issues with mining / Natural environment / Occupational safety and health / Mining / Copper mining / PolyMet mine / Biology / Friends of the Boundary Waters Wilderness / Tailings / Mercury / United States Environmental Protection Agency / Acid mine drainage


Letter re: St. Louis River Area of Concern - May 23, 2014
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Document Date: 2014-05-27 18:37:19

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File Size: 232,28 KB

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