The new report evaluated air quality in different parts of the country by measuring the presence of ozone and particle pollution in the atmosphere.

This story was originally published by CalMatters. Sign up for their newsletters. Last week fog crept over the Tijuana Estuary in Imperial Beach, oozing a pungent rotten-egg smell, as hydrogen sulfide ...

A study of schoolgirls finds that living in polluted areas is more consistently linked to reduced attention than diet quality, and that antioxidant intake offers no clear protection against memory ...

Louisville's air quality ranked among the worst in the country in a new analysis, as the region struggled to rein in ozone pollution.

Federal actions threaten progress in protecting Tennessee children from air pollution, according to the American Lung ...