Photos: Fog or smog? Pollution at dangerous levels in China
Credit: Lintao Zhang/Getty Images
BEIJING, CHINA - JANUARY 29: A men rides a three-wheeled motorcycle on the street through power station chimney during severe pollution on January 29, 2013 in Beijing, China. The 4th dense fog envelops Beijing with pollution at hazardous levels in January. (Photo by Lintao Zhang/Getty Images)
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