PHOTOS: China's Smog Conditions Like 'Nuclear Winter'

A general view of the pollution covered Beijing CBD on Feb. 25, 2014 in Beijing.

Lintao Zhang—Getty Images

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People look at an area of central Beijing blanketed in smog on Feb. 24, 2014.

Kyodo—Landov

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Cars drive on the Three Ring Road amid the heavy haze in Beijing, Feb. 26, 2014.

Jason Lee—Reuters

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CCTV Building is shrouded in heavy smog on Feb. 25, 2014, in Beijing.

ChinaFotoPress—Getty Images

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A tourist wearing a face mask climbs Jingshan Hill beside the Forbidden City as heavy air pollution continues to shroud Beijing on Feb. 26, 2014.

Mark Ralston—AFP/Getty Images

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A chimney of a heating plant is obscured by heavy haze as commuters walk through a bridge linking a subway station and a bus station on a severely polluted day in Beijing, Feb. 25, 2014.

Alexander F. Yuan—AP

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Chinese tourists wearing face masks visit Tiananmen Square as heavy air pollution continues to shroud Beijing on Feb. 26, 2014.

Mark Ralston—AFP/Getty Images

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ChinaFotoPress—Getty Images

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Children walk back home after school on a severely polluted day in Shijiazhuang, in northern China's Hebei province, Feb. 26, 2014.

Alexander F. Yuan—AP

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A woman tries to take photos on the river bank in the haze in southwest Chongqing Municipality, Feb. 23, 2014.

Ran Wen—EPA

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A farmer shovels in a field near electric pylons in heavy haze on a severely polluted day in Shijiazhuang, in northern China's Hebei province, Feb. 26, 2014.

Alexander F. Yuan—AP

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