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Structural evolution of China's intersectoral embodied carbon emission flow network.

Xiaoping Wang1, Junqi Yu2, Jinzhao Song3

  • 1School of Management, Xi'an University of Architecture and Technology, Xi'an, 710055, China.

Environmental Science and Pollution Research International
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PubMed
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This study reveals China's industrial embodied carbon emissions form complex networks. Key sectors like metal smelting and chemical industries are central, with construction being a major pathway for emission reduction efforts.

Keywords:
ChinaComplex networkEmbodied carbon emission flowInput-output tableSector

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Area of Science:

  • Environmental Science
  • Economics
  • Network Theory

Background:

  • Embodied carbon emissions form complex networks across industrial supply chains.
  • Understanding the structure and evolution of these networks is crucial for effective carbon reduction strategies.

Purpose of the Study:

  • To analyze the structure and evolution of embodied carbon emission flow networks in China's industrial sectors.
  • To identify key sectors and flow paths within these networks for targeted emission reduction policies.

Main Methods:

  • Application of complex network theory to construct and analyze embodied carbon emission flow networks.
  • Utilizing input-output tables for 30 industrial sectors in China from 2002 to 2015.
  • Analysis of network indicators, including weighted degree and betweenness centrality.

Main Results:

  • The networks exhibit small-world characteristics and industrial clustering.
  • Construction, manufacturing, and services are emission absorption sites; coal and petroleum are emission divergence sites.
  • Metal smelting and chemical industries are central; construction is a key flow path for emissions.
  • A small percentage of network connections carry a large proportion of embodied carbon emissions, showing a long-tail distribution.

Conclusions:

  • Key sectors and flow paths, particularly those involving construction, are critical for carbon emission reduction policies.
  • The increasing centrality of key sectors highlights the need for focused policy interventions.
  • Targeting high-emission pathways and central industrial nodes is essential for mitigating embodied carbon emissions.