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 ...