"In Montana's Indian country, tribes take opposite sides on coal", 21 August 2017

While Native American lands cover 2 percent of the U.S. surface, they have been estimated to contain a fifth of the nation’s remaining petroleum, along with vast coal reserves - making them a key part of Trump’s effort to boost domestic production... For tribes such as the Crow, Trump's rise marks an opportunity to tap more of the vast energy reserves beneath their lands for a needed economic boost... For other tribes including the Northern Cheyenne, the administration poses a threat by too forcefully injecting its fossil-fuel agenda into tribal policy while ignoring environmental and social concerns. The tribe wants more stringent rules to ensure that nearby mines don't pollute its water supply with waste runoff and that a nearby coal-fired power plant has the proper air pollution controls...