2016 PM2.5 | 73 2015 9.9% | 2012 23.7% 2017 | | 9 | | | 2013 2017 PM2.5 | 60 | | 1200 | | | | | | 2015 3 | 2017 3 | | | | 19 8 | | 1/3 | 14% | 86% | |