The Trump administration is also ending federal requirements that push car makers to produce more low-emission models.Start ...

Northern Arizona is famous for its aspen trees, and a multi-decade study looks into how they’re being affected by climate ...

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

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

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 like the Colorado River.