Reducing Indoor Levels of "Outdoor PM2.5 " in Urban China: Impact on Mortalities

Environmental Science & Technology
J XiangY Zhang

Abstract

This study estimates adult mortalities attributed to PM2.5 across urban China in 2015 and the corresponding mortalities that might be avoided by meeting the yearly averaged indoor PM2.5 threshold in the newly established Assessment Standard for Healthy Building (ASHB) and seven other potential thresholds. We use outdoor PM2.5 concentrations from ∼1500 monitoring sites in 339 Chinese cities, coupled with a detailed exposure model, to estimate outdoor and indoor exposures to PM2.5 originating outdoors. We proceed to calculate premature mortality attributable to PM2.5 exposure using an integrated exposure-response model. Results indicate that indoor exposures accounted for 66%-87% of total exposure to PM2.5 of outdoor origin and 81% (95% confidence interval (CI), 71%-87%), i.e., 316 000 (95% CI, 176 000-435 000), of the 389 000 (95% CI, 245 000-501 000) mortalities attributable to "outdoor PM2.5" for the urban population ≥25 years of age in China in 2015. Potentially 14 000 (95% CI, 8000-20 000) deaths might be avoided if indoor PM2.5 of outdoor origin met the ASHB guideline of 35 μg/m3 for annual mean indoor PM2.5, and 162 000 (95% CI, 79 000-237 000) deaths might be avoided by meeting a 10 μg/m3 threshold. The analysis in this w...Continue Reading

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Citations

Nov 13, 2019·Environmental Science. Processes & Impacts·Jonathan P D Abbatt, Chen Wang
Aug 3, 2020·Environment International·Scott D LowtherKevin C Jones
Jan 30, 2021·The Science of the Total Environment·Huizhong ShenShu Tao
Apr 30, 2021·Environmental Monitoring and Assessment·Kai XinYuejing Gao
May 1, 2021·International Journal of Environmental Research and Public Health·Amanda J WheelerFay H Johnston
May 13, 2021·Environmental Science & Technology·Xiao YunShu Tao
Jun 18, 2021·Environment International·Prashant KumarAbdus Salam
Oct 22, 2021·Environmental Science & Technology·Wenjun MengShu Tao

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