First-week orders could undermine progress on clean energy investments, pollute the air and add few benefits to the economy, ...

As Phoenix emerges from its hottest year on record, President Donald Trump signed a series of orders designed to expand U.S.

A Republican wants to change Arizona law to ban “geoengineering” in the state aimed at addressing the rapid effects of ...

While there might not be as many freshwater species, Northern Arizona University researchers say it would still hurt areas ...

Most climate scientists are certain that global warming has played a critical role in the California wildfires, despite political posturing.

January's Colorado River basin snowpack is about normal, but without a snowy late winter, Arizona will likely see sustained ...

There are no significant proven oil or gas reserves in Arizona, and analysts say the effects on gas prices are unclear. As climate change progresses, the state is more likely to see deeper ...