FILE - This Feb. 10, 2016 file photo shows a former iron ore processing plant near Hoyt Lakes, Minn., that would become part of a proposed PolyMet copper-nickel mine. The Minnesota Department of Natural Resources on Wednesday, Feb. 12, 2020, asked the state Supreme Court to overturn a lower court decision that rejected some of the most important permits for the proposed PolyMet copper-nickel mine. The case is one of several pending before the courts in the long-running battle over what would be Minnesota's first copper-nickel mine. (AP Photo/Jim Mone, File)
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