Arizona lawmakers want more solar energy projects in western areas of the state, a goal that could get mixed support from the ...

Arizona Rep. Paul Gosar has introduced one of ... reduce energy prices and boost fossil fuel production. So-called “baseload” power usually means fossil fuels, some hydropower, and nuclear ...

Arizona Corporation Commission Chair Kevin Thompson faces, and dismissed, questions of conflict in new ethics claims by a utility watchdog group.

House Democrats’ new leader on a Natural Resources subcommittee is vowing to use her perch to fact-check Republican messaging ...

A Pteranodon and Plesiosaur fossil hit the auction block at Sotheby’s, fetching top bids.

Arizona, the last of the contiguous territories ... of climate-warming greenhouse gas emissions generated by the use of fossil fuels to accelerate global industry and mobilization.

Bernard DeVoto, the Utah-born writer and historian, wrote an essay titled “The West Against Itself” for Harper’s Magazine.

Many of the nation’s largest electric utilities are not on track to achieve their interim emission reduction goals or the ...

Arizona, the last of the contiguous territories to gain statehood ... is largely a result of climate-warming greenhouse gas emissions generated by the use of fossil fuels to accelerate global industry ...

Travelers can dig up 66-million-year-old dinosaur fossils in New Jersey or mine for diamonds at an Arizona state park. See ...

Let’s recognize that protecting our hearts isn’t just about diet and exercise — it’s also about the air we breathe. We are ...