Montana Copper Mine
FILE – In this May 10, 2017, file photo, is the Smith River in central Montana. Environmental regulators on Thursday, April 9, 2020, approved plans for a copper mine in central Montana that marks a major milestone in a long-running dispute. But the move will likely be challenged by environmental advocates who worry about the mine’s proximity to one of the state’s most popular recreational rivers, the Smith River. (Rion Sanders/Great Falls Tribune via AP, File)