Ozone

The annual “State of the Air” report from the American Lung Association shows some progress for the region and the nation in smog reduction but reports that particulate pollution levels are deadly.

Missouri health advocates say a recent decision by the U.S. Environmental Protection Agency to review its current ozone air quality standards will delay efforts to improve air quality.

Even when skies are clear, air pollution can affect the health of sensitive groups.

Ground-level ozone arises when emissions from vehicles, power plants and other sources react to sunlight.

State regulators were able to show that because of people buying new cars, emission levels will keep dropping even without testing to document it.

Ozone pollution in St. Louis has slightly improved, according to the 2018 State of the Air report released this month by the American Lung Association.…

The Missouri Department of Natural Resources proposes spending the $41 million it received from the Volkswagen settlement last year on replacing school…

A report released Monday finds that two power plants in Arkansas are partly responsible for poor air quality in St. Louis. Scientists from…

The St. Louis metro area has one of the worst smog levels in the country. In recent years, ozone levels have declined, but the region must comply with…

There's good ozone and there's bad ozone. The good kind sits up high up in the stratosphere, protecting us from the sun's ultraviolet rays. The bad kind…