Beijing Air Pollution Reaches Dangerous Level

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Beijing residents wearing the mask ride amid fog during severe... News PhotoBeijing,Bestof,China - East Asia,Civilian,Environmental Damage,Environmental Issues,Fog,Pollution,Riding,Serious,Topics,Topix,VerticalPhotographer Collection: Getty Images News 2013 Getty ImagesBEIJING, CHINA - JANUARY 29: Beijing residents wearing the mask ride amid fog 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 Feng Li/Getty Images)