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

The Trump administration is also ending federal requirements that push car makers to produce more low-emission models.Start the day smarter. Get all the news you need in your inbox each morning.

Northern Arizona is famous for its aspen trees, and a multi-decade study looks into how they’re being affected by climate change. Among the findings: There are a good number of smaller, younger aspens and a good number of older ones,

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 ...

More than 1 million people could pour into western Maricopa County in the coming decades – if housing developers can secure the water.

Artist Charles Gaines doesn't want to tell you what to think; he wants his work to inspire viewers to think for themselves.

The Old Farmer's Almanac, which has been in business since 1792, recently released its spring weather forecast. The outlook? "Warmer-than-normal temperatures for most of the country, with a few exceptions: southern and central California, Desert Southwest, southern Florida, and western Ohio Valley, where it will be near to below normal."

Chief of the global services firm since 2022 highlights the need for innovation in the water sector as a way to increase affordability.

Doug Burgum will be the point person for public land management and President Trump’s “drill, baby, drill" agenda to expand oil and gas development.

Democratic Arizona Gov. Katie Hobbs is renewing a push to regulate groundwater in rural parts of the drought-stricken state.

The Maricopa County Air Quality Department wants to find out how much you know about high pollution advisories, no burn days and other alerts. The department is looking for public participation on a new Clean Air Awareness Survey.

The streak ended just one day shy of tying the current record of 160 days without measurable rain in Phoenix, a record set in 1972. And it's still dry. With the .01 of an inch recorded Wednesday, Phoenix is still 2.68 inches below average since Oct. 1, the start of the water year.