Arizona is giving researchers more time to study the risks from thousands of old, abandoned mines across the state.

As tariffs threaten global trade, Redwood Materials is building the first major domestic US supply of crucial EV battery ...

The federal government wants the number of offices that oversee U.S. mine safety laws to align more with a shrinking coal ...

After a five-year fight, a US District Court for the District of Arizona granted a temporary restraining order to block a ...