It's not a new problem, but the country's struggle with air pollution has finally gone mainstream.
When you pedal it, the Bangkok Air-Purifier Bike supposedly removes nasty stuff from the atmosphere.
Blame cars, and coal-fired burners.
What pairs best with the Asian brown cloud? Try the "Vogmask."
Cold weather brought brutal levels of air pollution to the country's north.
A lack of wind, corn burning for the harvest, and the onset of central heat fouled up Harbin's air so much that schools and offices had to close.
A ground-breaking new report finds that air pollution – not any one contaminant – is the "leading environmental cause of cancer deaths."
Exposure is getting worse in parts of the world, especially industrializing countries.
Officials recently decided to prohibit people form using bicycles on nearly 200 streets in the central city during the day.
A train tour through China's coal country, where every bit of the shadowy landscape has been pressed into the service of power generation.
A new NASA map of the planet lays out the depressing geographies of smog and premature death.
Evidence of a particularly negative feedback loop.
DIY entrepreneurs have developed ingenious—and affordable—products to satisfy the public's insatiable demand for pure air.
Wind is lifting thousands of tons of desert sand into the air and blowing it over the Atlantic Ocean; this intriguing animation shows where it's headed.
The skies are clouded with ashy gas that's pouring from thousands of acres of burning plants.
But silver lining: This scourge isn't being worsened much by that other anthropogenic menace, climate change.
And this could go on for several weeks.
Record air pollution levels hit the city-state thanks to forest fires in its neighboring country.
In 2010, air pollution contributed to 1.2 million deaths and 2013 looks like it could be even worse.