Changes in air pollution levels after COVID-19 outbreak in Korea.

ABSTRACT: In order to control the spread of COVID-19, social distancing measures were implemented in many countries. This study investigated changes in air pollution during the social distancing after the COVID-19 outbreak in Korea. Ambient PM_2.5, PM₁₀, NO₂, and CO that are particularly related to industrial activities and traffic were reduced during the social distancing in response to the COVID-19 outbreak. In March 2020, immediately after social distancing, mean levels of PM_2.5, PM₁₀, NO₂, and CO decreased nationwide from last year's mean levels by 16.98 ?g/m³, 21.61 ?g/m³, 4.16 ppb, and 0.09 ppm, respectively (p-value for the year-to-year difference <0.001, =0.001, =0.008, <0.001), a decrease by 45.45%, 35.56%, 20.41%, and 17.33%, respectively. Changes in ambient O₃ or SO₂ were not observed to be attributable to social distancing. Our findings, that such effort for a short period of time resulted in a significant reduction in air pollution, may point toward reducing air pollution as a public health problem in a more sustainable post-COVID-19 world.

SUBMITTER: Ju MJ 

PROVIDER: S-EPMC7402377 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature