By Hannah Northey, E&E News
The Rosebud coal mine near Colstrip is at the center of a long legal battle over air pollution and heat-trapping gas. It is slated to operate until 2039.

Aerial view of Rosebud Coal mine.(c) Kestrel Aerial Services, Inc. (c)www.kestrelaerial.com
The Interior Department has signed off on the expansion of a Montana coal mine to feed high-emission power plants in yet another Trump administration effort to bolster coal production despite waning demand and pollution concerns.