| | | ● | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PM 2.5 | 2013 68 / | 2023 30 / | 56 % PM 2.5 4 | 2023 | 89.4 % 2012 | 27.8 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 30 100 | 1000 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ; | | | ; | | | ; | | | | | | | | | | | | | | | | | | | | | | | | |