Beijing Air Pollution Reaches Dangerous Level

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A Chinese policeman guards under the Tiananmen Gate during dangerous... News PhotoAir Pollution,Beijing,Bestof,China - East Asia,Danger,Environmental Damage,Environmental Issues,Horizontal,International Landmark,Police Force,Pollution,Tiananmen Gate Of Heavenly Peace,Topics,Topix,WindPhotographer Collection: Getty Images News 2013 Getty ImagesBEIJING, CHINA - JANUARY 29: A Chinese policeman guards under the Tiananmen Gate during dangerous levels of air 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)