Top 10 most air polluted Chinese cities in 2013
china.org.cn / chinagate.cn by Gong Yingchun, January 15, 2014
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Hengshui
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Vehicles move slowly on a road amid dense fog and haze in Hengshui, north China's Hebei Province, on Jan. 31, 2013. [File photo]
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Province: Hebei
Average annual PM2.5 density: 120.6
