Beijing's air quality hits 'serious pollution' level (1/5)
Xinhua
2013-01-23 16:54
Web Editor:Mo Hong'e
Citizens walk past the fog-enveloped National Stadium, or the "Bird's Nest", in Beijing, capital of China, Jan. 23, 2013. The air quality hit the level of serious pollution in Beijing on Wednesday, as smog blanketed the city. (Xinhua/Wang Zhen)
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