Reversal of trends in global fine particulate matter air pollution
Document Type
Journal Article
Publication Date
9-2-2023
Journal
Nature communications
Volume
14
Issue
1
DOI
10.1038/s41467-023-41086-z
Abstract
Ambient fine particulate matter (PM) is the world's leading environmental health risk factor. Quantification is needed of regional contributions to changes in global PM exposure. Here we interpret satellite-derived PM estimates over 1998-2019 and find a reversal of previous growth in global PM air pollution, which is quantitatively attributed to contributions from 13 regions. Global population-weighted (PW) PM exposure, related to both pollution levels and population size, increased from 1998 (28.3 μg/m) to a peak in 2011 (38.9 μg/m) and decreased steadily afterwards (34.7 μg/m in 2019). Post-2011 change was related to exposure reduction in China and slowed exposure growth in other regions (especially South Asia, the Middle East and Africa). The post-2011 exposure reduction contributes to stagnation of growth in global PM-attributable mortality and increasing health benefits per µg/m marginal reduction in exposure, implying increasing urgency and benefits of PM mitigation with aging population and cleaner air.
APA Citation
Li, Chi; van Donkelaar, Aaron; Hammer, Melanie S.; McDuffie, Erin E.; Burnett, Richard T.; Spadaro, Joseph V.; Chatterjee, Deepangsu; Cohen, Aaron J.; Apte, Joshua S.; Southerland, Veronica A.; Anenberg, Susan C.; Brauer, Michael; and Martin, Randall V., "Reversal of trends in global fine particulate matter air pollution" (2023). GW Authored Works. Paper 3459.
https://hsrc.himmelfarb.gwu.edu/gwhpubs/3459
Department
Environmental and Occupational Health