Grist: A huge new coal-mining project just approved by the federal government pits a Montana tribe against native communities in the Pacific Northwest. The Crow Nation in southern Montana overlaps the coal-rich Powder River Basin. The tribe is sitting on a deposit of up to 1.4 billion tons of coal - more than the United States produces in a year - and on Thursday, the federal government approved the lease of that coal to mining company Cloud Peak Energy. The company has begun preliminary work on a mine...