Arizona’s three public universities have developed a new tool to help environmental officials find and cleanup abandoned mines in the state.

PATAGONIA, Ariz.—When Becky and John Ball retired from careers in firefighting, they found their dream home in the foothills of Arizona’s famed Patagonia mountains. But less than a year after moving ...

Arizona is running out of water, yet we’re preparing to hand over hundreds of billions of gallons to a single foreign-owned copper mine. The proposed Resolution Copper project, a joint venture of ...