Comparison of PM_2.5 and CO₂ Concentrations in Large Cities of China during the COVID-19 Lockdown.

ABSTRACT: Estimating the impacts on PM_2.5 pollution and CO₂ emissions by human activities in different urban regions is important for developing efficient policies. In early 2020, China implemented a lockdown policy to contain the spread of COVID-19, resulting in a significant reduction of human activities. This event presents a convenient opportunity to study the impact of human activities in the transportation and industrial sectors on air pollution. Here, we investigate the variations in air quality attributed to the COVID-19 lockdown policy in the megacities of China by combining in-situ environmental and meteorological datasets, the Suomi-NPP/VIIRS and the CO₂ emissions from the Carbon Monitor project. Our study shows that PM_2.5 concentrations in the

SUBMITTER: Liu C 

PROVIDER: S-EPMC8926446 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature