Despite improvements in air quality in past decades, 156 million Americans still breathe in too much soot or ozone, says the ...

Nearly half of Americans are living in places that get failing grades for unhealthy levels of ozone or particle pollution, ...

“State of the Air” uses letter grades to measure unhealthy levels of ground-level ozone air pollution (also known as smog), ...

A new report from the American Lung Association notes a drastic decline in air quality and raises health alarms. Climate ...