| | 2020 | 2021 | 2020 2021 | | | | | | | | 2020 | | | | | | | | | | | 291 3 | 88.2% PM2.5 29 | / | | 9 | 100% | 4 | 75% | | | | 100% | 98% | 24 23 | | | | | 1000 | | | 4 | | | | 3 6 | | 80% | 9 | 16.7 | 1.4 | | 3098 | | | | | | | | | 2021 | | | | | | | | | | 70 | 100 | | | | | | | | |