| 2021 1 12 | 89.6% | 1.1 | | 53.4% | 23.9 12 | 99. | 5% 97.5% 96.7% | 95.3% 92.1% 89.3% | 87.1% 85.8% 85.7% | 83.0% 83.0% 79.7% | PM2.5 23 / | 17.9% 12 | PM2.5 | 9 / 17 / | 20 / 21 | / 22 / | 22 / 24 / | 25 / 26 / | 28 / 29 / | 30 / | | 12 | | | | |