Heavily polluted air in Beijing

john  —  January 13, 2013

People visit the Tian'anmen Square in Beijing, capital of China, Jan 11, 2013. The PM 2.5 (particles less than 2.5 microns) data in Beijing hit 240 to 446 on Friday, which means the 6 rating heavily polluted air quality. [Photo/Xinhua]

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Related story:

Beijing air pollution soars to hazard level (BBC)