@article {40895,
	title = {Drivers of improved PM2. 5 air quality in China from 2013 to 2017},
	journal = {Proceedings of the National Academy of Sciences},
	volume = {116},
	number = {49},
	year = {2019},
	pages = {24463-24469},
	isbn = {0027-8424},
	author = {Qiang Zhang and Zheng, Yixuan and Tong, Dan and Min Shao and Shuxiao Wang and Yuanhang Zhang and Xu, Xiangde and Wang, Jinnan and He, Hong and Liu, Wenqing}
}
