Environmental groups say grazing cattle damage fragile riparian habitat and have pressured the Forest Service to remove animals that don't belong.

Agencies are spending millions to thin forests to safeguard mountainside communities from future wildfires and post-fire floods.

The Hopi see influence of climate change — and suspect a link to coal industry’s groundwater pumping.

A controversial copper mine that will obliterate an Apache cultural site and other cultural and environmental assets appears to be on the fast track.

Biocrust could prevent dust storms and erosion, even slow wildfires, but it's vulnerable to human activity and, increasingly, climate change.