The American Lung Association has revealed that nearly half the U.S. population resided in areas with dangerous levels of air ...

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

Smog from wildfires sweeping the nation has left tens of millions more Americans to breathe toxic air even as man-made forms of pollution fall, according to a new study released Wednesday.

ROANOKE, Va. – Nearly half of the U.S. population is now living with unhealthy levels of air pollution. The primary culprits are extreme heat, persistent droughts, and increasingly frequent ...

but nearly half of Americans still live with unhealthy air pollution, a new report finds. The report comes as the Trump administration is considering rolling back some key air quality regulations.