PolyMet Mining has been working for years to demonstrate its plan would avoid scenarios that infuriate environmentalists. The latest study on how an open pit copper-nickel mine could change the landscape just north of the town of Hoyt Lakes will be released Friday in a 1,800-page environmental impact statement. More: PolyMet copper-nickel mine: Economic opportunity or too environmentally risky?"
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Photos: At PolyMet, ramping up to mine copper
Business AURORA, Minn. ·