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E-mail Xinhua, October 22, 2013|
Haze shrouds Changsha, capital of central China's Hunan Province, Oct. 22, 2013. Air pollution monitors in Changsha showed that the AQI (air quality index) hit level 5 in the 11:00 a.m. this morning. And the air pollution is caused by PM2.5 primarily. [Photo/Xinhua] |