Montana tribe, conservationists sue US government for ending coal moratorium.

U.S. President Donald Trump holds up an executive order on ''Energy Independence,'' eliminating Obama-era climate change regulations, during a signing ceremony at the Environmental Protection Agency (EPA) headquarters in Washington, U.S., March 28, 2017. REUTERS/Carlos Barria
U.S. President Donald Trump holds up an executive order on ”Energy Independence,” eliminating Obama-era climate change regulations, during a signing ceremony at the Environmental Protection Agency (EPA) headquarters in Washington, U.S., March 28, 2017.

REUTERS/Carlos Barria