Spatial characteristics of change trends of air pollutants in Chinese urban areas during 2016–2020: The impact of air pollution controls and the COVID-19 pandemic
Chanchan Gao, Fengying Zhang, Dekun Fang, Qingtao Wang, Min Liu
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Air quality indexAir pollutionEnvironmental sciencePollutionChinaPollutantOzoneCoronavirus disease 2019 (COVID-19)PandemicEnvironmental protectionEnvironmental healthGeographyMeteorologyMedicineDiseasePathologyEcologyOrganic chemistryChemistryBiologyInfectious disease (medical specialty)ArchaeologyAir Quality and Health ImpactsCOVID-19 impact on air qualityClimate Change and Health Impacts