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Beijing air pollution 2 28 2013

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Beijing and northern China are reeling from high air pollution levels after a sandstorm blew strong winds through the area.
Beijing air pollution 2 28 2013

A Chinese man wears a facemask as Beijing is hit by a sandstorm as well as air quality worse than the highest classification of 'hazardous' on February 28, 2013.

MARK RALSTON