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Days of Excellent and Good Air Quality Account for 62% in 2020.

http://english.e23.cn2021-02-05 17:15:24

Abstract：　　The average annual concentration of PM 2.5 in 2020 ,Ji’nan has improved 42.7% compared to 2015, 34.7%, ...

　　The average annual concentration of PM 2.5 in 2020 ,Ji’nan has improved 42.7% compared to 2015, 34.7%, the air quality composite index. Days of excellent and good air quality account for 62%. All data above has achieved the highest level ever recorded.

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