A multiyear assessment of air quality benefits from China's emerging shale gas revolution: Urumqi as a case study - Song, Wei; Chang, Yunhua; Liu, Xuejun; Li, Kaihui; Gong, Yanming; He, Guixiang; Wang, Xiaoli; Christie, Peter; Mei* Zheng; Dore, Anthony J; Tian, Changyan (Environmental science & technology, 2015)