Abstract
The building sector contributes significantly to carbon emissions, impeding China’s progress toward its 2030 carbon emissions peak target due to the limited utilization of renewable energy sources. This study aims to forecast the peak and timing of carbon emissions in China’s construction industry to chart a low-carbon roadmap for the sector’s future. Initially, an extended logarithmic mean divisia index (LMDI) decomposition model, based on the Kaya identity, is proposed to gauge the contribution levels of driving factors affecting building carbon intensity. Subsequently, a hybrid prediction model (IGA-BP) is constructed, employing an optimized two-hidden-layer neural network via a genetic algorithm, to forecast building carbon emissions and intensity. Additionally, four scenarios are outlined, each defining pathways to simulate emissions peak, carbon peak timing, and intensity within the Chinese building sector from 2020 to 2050. The research findings reveal: (1) The final emission factor of buildings primarily drives the surge in building carbon intensity, while the industrial structure stands as the most significant limiting factor. (2) Compared to alternative models, the proposed hybrid prediction model more effectively captures the evolution pattern of carbon emissions. (3) The prediction results indicate that China’s building carbon intensity has reached its peak. Pathway 12 closely aligns with the sector’s carbon emissions peak, projecting a peak value of 5.609 billion tons in 2029. To attain this pathway, China needs to develop more precise and feasible emission reduction strategies for its buildings. Overall, the research outcomes furnish robust references for decision-making in future efforts aimed at reducing building emissions.
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The data used in the study are available from the corresponding author upon request.
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Funding
The research was financially supported by the National Natural Science Foundation of China (No. 51468022), the Humanities and Social Sciences Research Project of Jiangxi Provincial Higher Education Institutions (No. GL21118), Doctor Start-up Fund of Jiangxi Science & Technology Normal University, China (No.2020BSQD018), and Graduate Innovation Special Fund Funding Project of Jiangxi Science & Technology Normal University (No. YC2022- × 08).
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Junjie Xia: conceptualization of study, methodology, and writing—original draft; Hao Cui: conceptualization of study, methodology, and writing—reviewing and editing.
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Cui, H., Xia, J. Research on the path of building carbon peak in China based on LMDI decomposition and GA-BP model. Environ Sci Pollut Res 31, 22694–22714 (2024). https://doi.org/10.1007/s11356-024-32591-9
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DOI: https://doi.org/10.1007/s11356-024-32591-9