Top 10 most air polluted Chinese cities in 2013
china.org.cn / chinagate.cn by Gong Yingchun, January 15, 2014
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Xi'an
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A cleaner wearing a mask for protection from air pollution walks through the haze in Xi'an, capital of northwest China's Shaanxi Province. [File photo]
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Province: Shaanxi
Average annual PM2.5 density: 104.2
