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 ...

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

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.

President Trump’s first week in office included a flurry of executive orders with implications for Earth’s climate and environment

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,

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,

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

Rep. Lisa Fink said she understands geoengineering can be controversial and some people attach it to the “chemtrails” conspiracy theory.