FILE - In this Aug. 26, 2014 file photo, the Minntac taconite mine plant in Mountain Iron, Minn. is pictured. The Minnesota Court of Appeals on Monday, Dec. 9, 2019 reversed a decision by state regulators to renew a wastewater permit for U.S. Steel's Minntac iron mine in northeastern Minnesota. The court sent the dispute back to the Minnesota Pollution Control Agency for further proceedings. (Glen Stubbe/Star Tribune via AP, File)
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