Nonuniform impacts of COVID-19 lockdown on air quality over the United States Chen, L. -W. Antony ; Chien, Lung-Chang ; Li, Yi ; Lin, Ge Abstract Publication: Science of the Total Environment Pub Date: November 2020 DOI: 10.1016/j.scitotenv.2020.141105 Bibcode: 2020ScTEn.74541105C