Cities in California make up a significant proportion of the country's most polluted metropolitan areas when it comes to air ...

The American Lung Association report finds that climate events are causing more people in the U.S. to breathe toxic air even ...

Chicago's skyline has been shrouded in mystery as conflicting reports of toxic air chemicals swirl, leaving residents ...

A new report on air quality across the U.S. offers a cloudy prognosis on the long-term health of about 156 million residents ...

Several U.S. cities are experiencing heightened air pollution levels on Wednesday, including parts of Chicago.

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

Air pollution fell substantially as the city restricted car traffic and made way for parks and bike lanes. Over the past 20 ...

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

Man-made air pollution is decreasing, but overall air pollution is worse due in part of wildfire smoke, according to a new ...

The Houston area is among the worst in the country for air quality, according to the American Lung Association's State of the ...

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