Nearly 4 in 10 Americans – or more than 131 million people – lived in areas with unhealthy levels of air pollution in recent years, a new report finds. And the country’s air pollution ...

However, it’s also one of the most polluted cities in the world, with smog and burning rubbish making the air quality one of the worst globally. Air pollution is measured by the level of PM2.5 ...

NEW DELHI (AP) — Thick smog shrouded New Delhi and other cities around South and Southeast Asia as air pollution levels soared Thursday. Air pollution in the region worsens particularly in ...

In the drive to build smarter cities around the world, what is the most important thing we should do to tackle air pollution? Chokingly thick blankets of smog are often a byproduct of economic ...

An curved arrow pointing right. Parts of South Asia are filled with toxic smog, hurting not only residents' health, but the economies of India and Pakistan. More from News Parts of South Asia are ...

As Africa's most populous nation, Nigeria has its share of smog-filled cities, congested roads and aging vehicles. In an effort to clear the air, Nigeria will, effective December 1, 2012 ...

Charlotte was among N.C. cities that have seen a small increase in unhealthy-air days due to ozone pollution, the main ingredient in smog, the American Lung Association said Wednesday. Air quality ...