A South Korean city was covered in smoke on Wednesday, March 26, as raging wildfires claimed at least 24 lives in what acting President Han Duck-soo called the country’s “worst ever” wildfires.

The Jinshanling Great Walls shrouded in smog in Chengde, Hebei Province of China on February 24, 2014. (ChinaFotoPress/Getty Images) Want to see your images in our Photo of the Day posts? Use Flickr ...

The Los Angeles-Long Beach area is the country’s worst city for ozone pollution, or smog. A combination of factors, including heavy traffic, industry and wildfires have contributed to high ...

as IQAir places Bangkok firmly in the top 10 of most polluted cities Bangkok was ranked as the eighth most polluted city in the world this morning, according to air-quality monitoring website IQAir.

Those aren't just towers—they're enormous, verdant air filters for smog-choked cities ... outdoor greenery with concrete and glass. Mexico City's Via Verde Project, for instance, is transforming ...

MORE WEATHER Inversions are common in Utah, Manhan said. At its peak, the smog covered the view of the mountain range. "It took about three or four days to start building the haze -- the visible ...

Decreased visibility caused fatal collisions of cars and buses; polluted air would spread to the farms beyond the city and damage entire crops in a few hours. It would take years for scientists to ...

The sprawling city - a metropolitan area of more than 20 million people - has been blanketed in a thick cloud of smog since last weekend. Authorities blame the problem on dozens of wildfires that ...

BEIJING--Authorities issued their highest warnings for fog and haze on Tuesday as smog enveloped major cities in northern China, warning the public that visibility could drop to less than 50 ...