| 2024 4 25 | | 2024 | | | | 2024 1 | | 2024 6 | | | | | | | 2020 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | AQI | >200 2 48 | | AQI>200 | AQI>150 48 | | AQI | > 200 3 72 | | AQI > 200 48 AQI > 150 72 | | | AQI | > 200 4 96 | AQI > 300 2 48 | AQI 500 | AQI > 200 72 | AQI > 300 24 | | 24 | 48 | | | | | | | 2019 2023 | | | 2020 | | | | | | | | | | | | | | | | | | | | | | | | | | 1. O3 | | | | 2. | | A | | | B | | | | | | | | |