GLENWOOD SPRINGS, Colorado ” Ozone monitoring at several locations in Garfield County and at Ajax Mountain in Aspen show that ozone readings crossed or were close to crossing new federal air quality ...

Belching factory smokestacks and black smoke pouring from muscle-car tailpipes made the air unsafe to breathe in parts of the United States before legislation passed in the 1960s and the following ...

Ozone as a layer several kilometers up in the atmosphere protects living beings, including humans, from ultraviolet rays. But its accumulation at ground level can be very dangerous, Mongabay ...

TOLEDO, Ohio — The Toledo Metropolitan Area Council of Governments (TMACOG), as well as the city of Toledo, is warning the public of health risks that come with increased ground-level ozone in the ...

Our state’s air-quality agencies have posted our ozone results for 2025, and once again, the official ozone levels for Front Range Colorado exceed allowable federal levels. But this time there is a ...

In the stratosphere, ozone acts as a protective layer. But in the troposphere, at ground level, this colorless gas is incredibly harmful to human health and the environment in ways scientists are ...

Colorado's Front Range is looking at several days of high ozone ratings that will aggravate breathing difficulties and lead to warnings and changes in plans. It comes while experts are still working ...