Hopi

Before the year ends, the Navajo Generating Station near the Arizona-Utah border will close and others in the region are on track to shut down or reduce their output in the next few years. Its owners are turning to cheaper power produced by natural gas as they and other coal-fired plants in the U.S. face growing pressure over contributing to climate change.

A federal judge has overturned the U.S. Forest Service's approval of plans for a new copper mine in southeastern Arizona in a decision that comes amid a larger battle across the West over the use of public lands for mining.