The American Lung Association's annual report highlights the health risks of air pollution, with nearly half of U.S. children ...

The Trump administration says the cities shouldn’t be penalized for unhealthy air because pollution can blow in from abroad.

Pedestrians walk along a road engulfed in thick smog in Lahore, Pakistan, on November 11. Lahore, a city of 14 million people and stuffed with factories, regularly ranks among the world's most ...

Nashville’s worsening air pollution earned an F grade for ozone smog in the American Lung Association’s annual State of the ...

The American Lung Association's annual State of the Air report gives the Indianapolis metro area failing grades for pollution ...

The three-year study hands out grades for smog and fine particle pollution. One of the state's major metro areas received ...

The Los Angeles-Long Beach retained its dubious distinction as the nation’s smoggiest region, with ozone pollution getting worse over the past year, according to an annual report by the American Lung ...

A new report from the American Lung Association revealed that two counties in the Inland Empire are the worst in the nation ...

Federal actions threaten progress in protecting Pennsylvania children from air pollution, according to the American Lung Association’s “State of the Air” report ...

Thick smog blanketed India's capital Thursday as the annual ritual of choking on incredibly polluted winter air took hold of New Delhi yet again. Authorities ordered many students to stay home as the ...

New Delhi — Authorities in India's sprawling capital city imposed even stricter emergency measures Monday in a bid to prevent illness as thick smog blanketed New Delhi. The air pollution was even ...