Understand the local and regional contributions on air pollution from the view of human health impacts

Yueqi Jiang, Jia Xing, Shuxiao Wang, Xing Chang, Shuchang Liu, Aijun Shi, Baoxian Liu, Shovan Kumar Sahu

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Front. Environ. Sci. Eng. ›› 2021, Vol. 15 ›› Issue (5) : 88. DOI: 10.1007/s11783-020-1382-2
RESEARCH ARTICLE

Understand the local and regional contributions on air pollution from the view of human health impacts

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Highlights

• PM2.5-related deaths were estimated to be 227 thousand in BTH & surrounding regions.

• Local emissions contribute more to PM2.5-related deaths than PM2.5 concentration.

• Local controls are underestimated if only considering its impacts on concentrations.

• Rural residents suffer larger impacts of regional transport than urban residents.

• Reducing regional transport benefits in mitigating environmental inequality.

Abstract

The source-receptor matrix of PM2.5 concentration from local and regional sources in the Beijing-Tianjin-Hebei (BTH) and surrounding provinces has been created in previous studies. However, because the spatial distribution of concentration does not necessarily match with that of the population, such concentration-based source-receptor matrix may not fully reflect the importance of pollutant control effectiveness in reducing the PM2.5-related health impacts. To demonstrate that, we study the source-receptor matrix of the PM2.5-related deaths instead, with inclusion of the spatial correlations between the concentrations and the population. The advanced source apportionment numerical model combined with the integrated exposure–response functions is used for BTH and surrounding regions in 2017. We observed that the relative contribution to PM2.5-related deaths of local emissions was 0.75% to 20.77% larger than that of PM2.5 concentrations. Such results address the importance of local emissions control for reducing health impacts of PM2.5 particularly for local residents. Contribution of regional transport to PM2.5-related deaths in rural area was 22% larger than that in urban area due to the spatial pattern of regional transport which was more related to the rural population. This resulted in an environmental inequality in the sense that people staying in rural area with access to less educational resources are subjected to higher impacts from regional transport as compared with their more resourceful and knowledgeable urban compatriots. An unexpected benefit from the multi-regional joint controls is suggested for its effectiveness in reducing the regional transport of PM2.5 pollution thus mitigating the associated environmental inequality.

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Keywords

PM2.5 / Regional transport / Local emissions / Health impact / Environmental inequality

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Yueqi Jiang, Jia Xing, Shuxiao Wang, Xing Chang, Shuchang Liu, Aijun Shi, Baoxian Liu, Shovan Kumar Sahu. Understand the local and regional contributions on air pollution from the view of human health impacts. Front. Environ. Sci. Eng., 2021, 15(5): 88 https://doi.org/10.1007/s11783-020-1382-2

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 41907190 & 21625701), Beijing Municipal Commission of Science and Technology (Z191100009119001 & Z191100009119004) and Tsinghua-Toyota Research Center. This work was completed on the “Explorer 100” cluster system of Tsinghua National Laboratory for Information Science and Technology.

Electronic Supplementary Material

Supplementary material is available in the online version of this article at https://doi.org/10.1007/s11783-020-1382-2 and is accessible for authorized users.

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