摘要
Fine particulate matter(PM_(2.5))and ground-level ozone(O_(3))are the primary air pollutants that degrade air quality in urban and regional areas of China.Since the implementation of the“Air Pollution Preven-tion and Control Action Plan”in 2013,ambient concentrations of PM_(2.5)have significantly decreased across China.However,O_(3)levels exhibited an upward trend until 2019 and have since remained elevated,despite the COVID-19 pandemic.Currently,no city in China has achieved the World Health Organization’s guidelines for PM_(2.5)(24-hour mean of 15μg m^(−3)and annual mean of 5μg m^(−3))and O_(3)(8-hour mean of 100μg m^(−3)).Therefore,more rigorous measures are necessary to alleviate PM_(2.5)and O_(3)pollution in China.
作者简介
Corresponding authors:Aijun Ding,E-mail addresses:dingaj@nju.edu.cn;Corresponding authors:Likun Xue,E-mail addresses:xuelikun@sdu.edu.cn。
