The Navigable Waters Protection Rule was a boon to some farmers and ranchers, but worried environmental groups as it significantly cut back the scope of bodies of water that were subject to federal oversight. But now, an Arizona district court is turning back the clock on the Trump administration’s new rule.
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An environmental consultant has issued a report on the potential water usage of a proposed copper mine in the Oak Flat area of Tonto National Forest.

Urban landscapes intensify the effects of dangerously hot and humid days. But scientists only broadly understand the interplay between escalating urban population growth and extreme heat exposure. A new study in the journal PNAS helps address that gap, and the news isn't good.

You may have seen an image floating around social media in the last few months — it shows the towering border wall covered in rings of barbed wire on one side. And facing it on the other, seemingly staring up at it, perplexed, is a single roadrunner.

On Monday, NASA successfully launched its Landsat 9 satellite. The spacecraft was built, tested and fitted with instruments by Northrop Grumman’s Satellite Manufacturing Facility in Gilbert.

Deep in the Cameron Peak burn scar, nestled among charred hills, there’s an oasis of green. Apart from a few scorched branches on the periphery, it’s hard to tell that this particular spot was in the middle of Colorado's largest-ever wildfire just a year ago. This wetland was spared thanks to the work of beavers.

Climate change impacts us all now, but for those living on Native American reservations, the environmental impacts are often more extreme. Now, the University of Arizona is starting a new center aimed at helping them address those challenges.

Environmental groups are accusing the federal government and the army of lying about how the operation of Fort Huachuca in southern Arizona is affecting the San Pedro River. They have asked a federal judge to take a second look.