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,

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

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

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

The study highlights the urgent need to safeguard global tropical wetlands from human impact. Complex organisms, thousands of times smaller than a grain of sand, play a critical role in shaping massive ecosystems and influencing Earth's climate,

Experts say Trump's moves to step away from global climate action, ramp up domestic oil and gas production and remove incentives for electric vehicles are worrisome. The planet continues to heat up; 2024 was Earth's hottest year on record,

Experts say Trump’s moves to step away from global climate action, ramp up domestic oil and gas production and remove incentives for electric vehicles are worrisome as the planet continues to heat up. 2024 was Earth’s hottest year on record, and climate scientists say the rising heat is contributing to extreme weather affecting millions.

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.

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 released its weather predictions for spring 2025. Here's what to expect in Arizona, including temperatures and rain.

The Republican-controlled Senate on Wednesday confirmed Lee Zeldin to lead the Environmental Protection Agency.