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Identifying key sectors based on cascading effect along paths in the embodied CO2 emission flow network in Beijing-Tianjin-Hebei region, China

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Abstract

The emission of carbon dioxide (CO2) is a serious environmental issue, especially in Beijing-Tianjin-Hebei region. Unlike previous studies that mainly consider the bilateral and direct connection between two sectors, this study identifies path-based key sectors by considering the cascading effect of a sector on other sectors on paths of the entire economic system. We first construct an embodied CO2 emission flow network of Beijing-Tianjin-Hebei region, combining environmental input-output analysis and complex network theory. Then, the path-based key sectors are identified by traversing the path of each sector in the network based on cascading failure theory and hypothesis extraction method. On the one hand, the results show that a small number of sectors shoulder a large proportion of the embodied CO2 emission flows from both path and sector perspectives. On the other hand, we identify some path-based key sectors that did not receive enough attention from the sector perspective. Additionally, the sum of the embodied CO2 emission flows in about 30 steps accounts for 90% of the total embodied CO2 emission flows on its supply chain path. To more effectively reduce carbon emission, sectors that connect these 30 steps should be concerned in some policy recommendations. The method proposed in this paper can complement existing methods and contribute to further reducing CO2 emissions in the Beijing-Tianjin-Hebei region.

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Funding

This research is supported by the Beijing Natural Science Foundation (Grant No. 9202013 and 9174041); the National Natural Science Foundation of China (Grant No. 71991481, 41871202, 71991480 and 71991485); the Humanities and Social Sciences planning funds project under the Ministry of Education of the PRC (Grant No. 17YJCZH047); the fund from Comprehensive geological survey of Beijing and its surrounding areas (Grant No. DD20190655); the Fundamental Research Funds for the Central Universities (Grant No. 265208247) and the fund from Key Laboratory of Carrying Capacity Assessment for Resource and Environment, Ministry of Natural Resources (Grant No. CCA2019.01).

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Correspondence to Xiangyun Gao.

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Responsible editor: Philippe Garrigues

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Jia, N., Gao, X., An, H. et al. Identifying key sectors based on cascading effect along paths in the embodied CO2 emission flow network in Beijing-Tianjin-Hebei region, China. Environ Sci Pollut Res 27, 17138–17151 (2020). https://doi.org/10.1007/s11356-020-08217-1

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  • DOI: https://doi.org/10.1007/s11356-020-08217-1

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