Oak Flat in Arizona is at the center of a struggle that's going on three decades. Here's everything that has happened with ...

A U.S. appeals court has temporarily blocked the transfer of federal forest land in Arizona to a pair of international companies that plan to mine one of the largest copper deposits in North America.

Activity at Arizona's mines is surging, and so is the release of toxic materials. A new Environmental Protection Agency report shows that releases of mine tailings and other toxic emissions increased ...