Beijing, China chokes in off-the-charts smog

The combination of a stagnant weather pattern and a swell of pollution sent the air quality index in Beijing soaring beyond "hazardous" levels.

D.C. air quality just keeps getting better! Zero code red days in 2014

This is the first time the D.C. area has gone two consecutive years without the issuance of a code red since the air quality color scale was introduced.

Yosemite air quality deteriorates as Meadow Fire burns east of Half Dome

Yosemite Park webcams paint a bleak air quality picture on Tuesday morning as the Meadow Fire continues to burn in Little Yosemite Valley.

NASA showcases big drop in air pollution over D.C., I-95 corridor since 2005

NASA has released some encouraging images showing a marked decline in air pollution over much of the eastern U.S.

Unhealthy air quality in December? What’s going on?

Since Monday, parts of Maryland and northwest Virginia have experienced compromised air quality in the code orange range.

U.S. once had air pollution to match China’s today

One of the worst U.S. air pollution episodes was the choking, deadly smog that covered Donora, Pa., in October 1948, killing 20 people and leaving roughly 7,000 ill in hospitals or at home.

  • Jack Williams
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  • Oct 25, 2013
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Chinese city shut down by off-the-charts pollution

The northern Chinese city of Harbin was effectively shut down Monday after suffocating in a dense soup of pollution.

Code orange air quality alert for D.C. area, first of 2013

The hot, stagnant air over the Washington, D.C. area has prompted the first air quality alert of 2013.