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

Senator Murkowski and Republicans in the United States Senate voted to endanger public health, kill clean energy jobs and their economic benefits, and raise costs for working families and small ...

Earlier this week, the Star interviewed longtime Arizona Sierra Club leader Sandy Bahr on her view that the proposed Colorado River drought contingency plan legislation for Arizona is a pathway to ...

The Idaho chapter of the Sierra Club is organizing an "emergency picket" tonight to advocate for the preservation of public ...

Tribal nations demand consultation on public lands sell-off plans, warning of threats to sovereignty and ancestral homelands ...

By Ross Kerber (Reuters) -Prominent U.S environmental organization Sierra Club Foundation said it will move $10.5 million ...

3. Yuma Yuma’s historic downtown beckons with its bold gateway sign, promising sunshine and some of Arizona’s most affordable living. Photo credit: Yuma Arizona Yuma shines as one of Arizona’s most ...

3. Yuma Yuma’s historic downtown beckons with its bold gateway sign, promising sunshine and some of Arizona’s most affordable living. Photo credit: Yuma Arizona Yuma shines as one of Arizona’s most ...

The head of the Arizona Sierra Club chapter, Sandy Bahr, urged lawmakers to vote down the bill. “Any claims that they are safer, cleaner and cheaper have not been proven in the real world, where cost ...

The Sierra Club and other partners are suing Elon Musk and his Department of Government Efficiency over the mass firing of federal workers across multiple agencies. The groups contend the purge will ...

Volunteers at work in the Verde River. A report from the Sierra Club’s Grand Canyon Chapter warns parts of the Upper Verde River could go dry within the next two decades if water use trends continue.

Arizona Attorney General, Sierra Club file suit to overturn Arizona Corporation Commission decision on Black Mountain Generating Station expansion ...