1 26 | | | | | | 2019 2020 | | | 11 10 | 3 2019 | 2020 | | PM2.5 | 3% | 3% | | | 10 1 11 19 | 8 | | PM 2.5 | 46 / | 4.2% | | | | | | | | | | | | | 6 | 24 | | | | | | | | | | | 2998 1860 | | | | | | | | | | | | | |