The US Environmental Protection Agency may soon stop putting a dollar value on the health benefits of cleaner air.

Breathing in air pollution like ozone and PM2.5 harms nearly every major system in the human body.

Ozone that protects us from the sun's harmful UV rays, when in an indoor space, reacts with oils present on skin, wall paint, ...

NASA and NOAA recently announced good news concerning the ozone hole. What are lessons about science, policy and skepticism for other challenges?

New furnaces and water heaters in Colorado will be more efficient and less polluting Starting Jan. 1, 2026, residential furnaces and water heaters sold in Colorado will be more efficient and less ...

Chronically high levels of ozone plague Colorado’s Front Range, which stretches from Fort Collins through the Denver metropolitan area and Colorado Springs. Colorado’s Front Range air quality problem ...

NASA and NOAA have announced encouraging news for Earth's climate: The 2025 Antarctic ozone hole is the fifth-smallest recorded in more than two decades. According to both agencies, international ...

Efforts to limit ozone-depleting chemical compounds had a significant impact. The ozone hole over the Antarctic is significantly smaller in 2025 than in previous years, ranking as the fifth-smallest ...

From A.D.H.D. to anxiety, disorders have risen as the expectations of childhood have changed. Credit...Photo illustration by Ricardo Tomas Supported by By Jia Lynn Yang One of the more bewildering ...

A sign displays an unofficial temperature as jets taxi at Sky Harbor International Airport at dusk, July 12, 2023, in Phoenix. (AP Photo/Matt York, File) PHOENIX (CN) — As air quality in the Phoenix ...