Legally mandated U.S. national climate assessments seem to have disappeared from the federal websites built to display them ...

DINGMAN: You mentioned obviously the impacts here in Arizona of things like the changes to plant regulations. How much leeway ...

President Donald Trump's tax and policy bill could slow Arizona's clean energy industry, but companies aren't talking.

Also, Arizona’s 3.23 degree rise in annual average temperature made it the nation’s third-fastest-warming state from 1970 to 2018, the analysis by Climate Central finds.

Environmental advocacy groups from throughout the Valley gathered at South Mountain Community College Thursday night to share ...

Backers of Arizona Lithium’s project include the Navajo Transitional Energy Company, which announced its plans in 2022 to join with the Australian company and work as a contractor on the project.

Trump is pressing lawmakers to pass the "One Big Beautiful Bill" by July 4. The Supreme Court limited the power that federal ...