ArticleEnvironmental sciences Europe2021
Air quality index variation before and after the onset of COVID-19 pandemic: a comprehensive study on 87 capital, industrial and polluted cities of the world.
Article in Environmental sciences Europe, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
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Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it.
- A qualitative and quantitative synthesis of the impacts of COVID-19 on soundscapes: A systematic review and meta-analysis.The Science of the total environment · 2022Pooled it
- COPD Exacerbations, Air Pollutant Fluctuations, and Individual-Level Factors in the Pandemic Era.International journal of chronic obstructive pulmonary disease · 2025Article
- Dynamics of atmospheric emissions and meteorological variables in Bangladesh from pre-to post-COVID-19 lockdown.Heliyon · 2024Article
- Comparative Assessment of the Impact of COVID-19 Lockdown on Air Quality: A Multinational Study of SARS-CoV-2 Hotspots.International journal of environmental research and public health · 2024Article
- Impact of Regional Mobility on Air Quality during COVID-19 Lockdown in Mississippi, USA Using Machine Learning.International journal of environmental research and public health · 2023Article
- Changes in preterm birth and stillbirth during COVID-19 lockdowns in 26 countries.Nature human behaviour · 2023Article
- Climate change: Comparing "green" and "polluting" nation-states.Frontiers in sociology · 2023Article
- Lockdown Amid COVID-19 Ascendancy over Ambient Particulate Matter Pollution Anomaly.International journal of environmental research and public health · 2022Review
- Research on COVID-19 and air pollution: A path towards advancing exposure science.Environmental research · 2022Article
- NASA Satellite Measurements Show Global-Scale Reductions in Free Tropospheric Ozone in 2020 and Again in 2021 During COVID-19.Geophysical research letters · 2022Article
- NOHeliyon · 2022Article
- Strict lockdown measures reduced PMSustainable water resources management · 2022Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundCoronavirus disease 2019 (COVID-19) pandemic provided an opportunity for the environment to reduce ambient pollution despite the economic, social and health disruption to the world. The purpose of this study was to investigate the changes in the air quality indexes (AQI) in industrial, densely populated and capital cities in different countries of the world before and after 2020. In this ecological study, we used AQI obtained from the free available databases such as the World Air Quality Index (WAQI). Bivariate correlation analysis was used to explore the correlations between meteorological and AQI variables. Mean differences (standard deviation: SD) of AQI parameters of different years were tested using paired-sample
resultsAQI-PM
conclusionsThe results indicated that air quality generally improved for all pollutants except carbon monoxide and ozone in 2020; however, changes in 2021 have been reversed, which may be due to the reduction of some countries' restrictions. Although this quality improvement was temporary, it is an important result for planning to control environmental pollutants.
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