"Environmental groups have gone to court to challenge the state's decision last month to grant two key permits for the proposed PolyMet copper-nickel mine near the Iron Range in northeastern Minnesota.

Eight different groups, including the Minnesota Center for Environmental Advocacy, Friends of the Boundary Waters Wilderness, and WaterLegacy, have asked the Minnesota Court of Appeals to overturn two major permits that were among several permits the state Department of Natural Resources granted to PolyMet last month.

In a third challenge, the groups are also asking the court to overturn the state's rules governing non-ferrous mining, saying the rules are too vague for courts and regulatory agencies to enforce."

Dan Kraker reports for Minnesota Public Radio December 3, 2018. [2]