President Donald Trump on Monday signed executive orders proclaiming that the U.S. government will recognize only two sexes, ...

The Center for Biological Diversity and the Patagonia Area Resource Alliance say federal regulators failed to review a ...

Planning for a new interstate through southern Arizona has been put on hold. 280 miles of highway between Nogales and Wickenburg expanding Interstate 11 had been proposed by federal and state ...

Conservation groups say the proposed Arizona routes for an Interstate 11 project failed to consider habitat for imperiled ...

President Trump will visit Los Angeles Friday to see the aftermath of the tragic, climate-fueled wildfires that killed at least 28 people and destroyed more than 15,000 structures. Trump’s visit comes ...

The giant salamander species in Appalachia was already in trouble when Hurricane Helene devastated swaths of its habitat in ...

Trump is taking aim at water supplies for an endangered fish, but scientists say he’s missing the point. It’s one of ...

The committee that decides the fate of endangered species is rarely summoned. But the president's "energy emergency" could change that.

The San Manuel Band of Mission Indians has used goats to manage brush on its lands that it fears could lead to wildfires ...

The proposed freeway would run from Wickenburg to Nogales and has been subject to lawsuit filed by a conservation group.

The process means that the communities get little input, even though the data centers create both air and noise pollution.

Foes of a plan to construct a new interstate highway — including a segment that could go through environmentally sensitive ...