  Dear Editor-in-Chief: We have given two articles published recently in
Science of the Total Environment by Mandal and Pal (2020) and
Zambrano-Monserrate et al. (2020) a thorough reading. Both articles present a
significant association between the novel Coronavirus (COVID-19) social
distancing policies and improvement in environmental quality such as air
pollution, land surface temperature, and noise. Both articles present good
research, complemented by detailed explanations and displays, yet we have a few
concerns that affect the interpretation and meaning of the results.
