China's ecological progress after the 18th CPC National Congress
- By Chen Xia
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E-mail China.org.cn, August 18, 2017
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![Sunset at Yuyuantan Park in Beijing. [File photo: Xinhua]](http://images.china.cn/attachement/jpg/site1007/20170817/f44d307d90cc1aff6d331a.jpg "Sunset at Yuyuantan Park in Beijing. [File photo: Xinhua]") |
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Sunset at Yuyuantan Park in Beijing. [File photo: Xinhua] |
? Clearer air
From 2013 to 2016, the average density of PM2.5, a major gauge of air pollution, decreased 33 percent in the Beijing-Tianjin-Hebei region in north China, decreased 31.3 percent in the Yangtze River Delta in east China, and decreased 31.9 percent in the Pearl River Delta in south China.
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