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Window cleaners hang from the side of a building on an extremely hazy day in Beijing Oct. 26, 2012. China's heavily polluted capital plans to reduce air pollution levels by 15 percent by 2015 and 30 percent by 2020 by phasing out old cars, relocating factories and planting new forests. (David Gray/Reuters) #
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Smoking chimneys and the cooling tower of a coal-burning plant stand next to electric pylons on a hazy day in Wuhan, Hubei province, Dec. 6, 2012. China will spend 350 billion yuan ($56 billion) by 2015 to curb air pollution in major cities. (Reuters) #
4
A laborer works atop a building in Hefei on a hazy day, Anhui province, Jan. 14, 2013. Chinese media reports the government had to take urgent action to tackle air pollution. (Reuters) #
5
Vehicles drive on the Third Ring Road on a very hazy winter day in Beijing, Jan. 12, 2013. Microscopic pollutant particles in the air have killed some 8,600 people prematurely in 2012 and cost $1 billion in economic losses in four Chinese cities, according to a study by Beijing University and Greenpeace. (Jason Lee/Reuters)#
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Vehicles run slowly in heavy fog in Hefei, central China's Anhui province, Jan. 14, 2013. Shares in a Chinese face mask manufacturer soared on January 15 as investors looked for opportunities to cash in on the severe air pollution that has blanketed large swathes of China. (AFP/Getty Images) #
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A woman helps adjust a mask for her friend outside an amusement park on a hazy day in Beijing, Jan. 12, 2013. Air pollution levels in China's notoriously dirty capital were at dangerous levels, with cloudy skies blocking visibility and warnings issued for people to remain indoors. (Alexander F. Yuan/Associated Press) #
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A woman checks her phone during polluted weather in Beijing, Jan. 13, 2013. Dense smog shrouded Beijing, with pollution at hazardous levels for a second day and residents were advised to stay indoors. (Ed Jones/AFP/Getty Images) #
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