A general view of the pollution covered Beijing CBD on Feb. 25, 2014 in Beijing.Lintao Zhang—Getty ImagesPeople look at an area of central Beijing blanketed in smog on Feb. 24, 2014. Kyodo—LandovCars drive on the Three Ring Road amid the heavy haze in Beijing, Feb. 26, 2014.Jason Lee—ReutersCCTV Building is shrouded in heavy smog on Feb. 25, 2014, in Beijing.ChinaFotoPress—Getty ImagesA tourist wearing a face mask climbs Jingshan Hill beside the Forbidden City as heavy air pollution continues to shroud Beijing on Feb. 26, 2014. Mark Ralston—AFP/Getty ImagesA chimney of a heating plant is obscured by heavy haze as commuters walk through a bridge linking a subway station and a bus station on a severely polluted day in Beijing, Feb. 25, 2014. Alexander F. Yuan—APChinese tourists wearing face masks visit Tiananmen Square as heavy air pollution continues to shroud Beijing on Feb. 26, 2014. Mark Ralston—AFP/Getty ImagesChinaFotoPress—Getty ImagesChildren walk back home after school on a severely polluted day in Shijiazhuang, in northern China's Hebei province, Feb. 26, 2014. Alexander F. Yuan—APA woman tries to take photos on the river bank in the haze in southwest Chongqing Municipality, Feb. 23, 2014.Ran Wen—EPAA farmer shovels in a field near electric pylons in heavy haze on a severely polluted day in Shijiazhuang, in northern China's Hebei province, Feb. 26, 2014.Alexander F. Yuan—AP
