Top 10 Chinese cities with worst air quality
China Daily, March 21, 2014
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Xi'an
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Buildings are shrouded by dense smog in Xi'an, capital of Shaanxi Province. [Photo/cnwest]
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Xi'an is the capital of Shaanxi Province, and a sub-provincial city of China. With more than 3,100 years of history, it is also one of the oldest cities in China.
