Citing a “national energy emergency,” the federal government gave a green light to a long-delayed expansion of Signal Peak Energy’s Bull Mountains coal mine near Billings.

A U.S. district judge in Arizona has opened the door for the next round of legal wrangling as environmentalists and some ...

The Alabama-based company planning to open a titanium mine adjacent to the Okefenokee Swamp has not submitted $2.1 million in financial assurances required to get a permit from ...