http://english.e23.cn 2022-04-28 18:41:52
The comprehensive index of the ambient air quality of Shandong in the first quarter of 2022 was 4.69 , with a year-on-year improvement of 14.1%. The proportion of days of good air quality was 75.4%, with a year-on-year improvement of 11.5%. Days of heavy pollution was 1.1 days, 4.5 days less than the same period last year.
