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

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 ...

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

But that practice is also strained by climate change compressing the window when burning can safely take place, Safford said. In Arizona, too, what used to be known as "wildfire season" has ceased ...

The study highlights the urgent need to safeguard global tropical wetlands from human impact. Complex organisms, thousands of ...

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

The orders could affect Arizona through their impact on climate change and potential harm to the electric vehicle industry. There are no significant proven oil or gas reserves in Arizona ...

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