Add Yahoo as a preferred source to see more of our stories on Google. Aug. 18—The state government's stalled entry into the Regional Greenhouse Gas Initiative continues to cost the state money as ...

Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution, according to the American Lung Association’s annual State of the Air report, released Wednesday.

Air in the U.S. has gotten cleaner for decades, adding years to people's lives and preventing millions of asthma attacks, but nearly half of Americans still live with unhealthy air pollution, a new ...

A new report on air quality across the United States offered a cloudy prognosis on the long-term health of about 156 million residents who live in areas that received an "F" in smog and soot pollution ...

Millions of people across the US and Canada experienced some of the worst air quality in the world last week as smoke from Canadian wildfires blanketed towns and cities with thick, orange smog. In New ...