Sectoral Coordination to Maximize China’s National and Provincial Building Carbon Emissions Mitigation
Qiance Liu , Kairui You , Xin Ouyang , Wei Feng , Kun Sun , Menglin Dai , Wu Chen , Weiguang Cai , Gang Liu
Engineering ›› : 202609012
The building sector is central to achieving China’s carbon peak and neutrality targets, yet existing assessments seldom integrate full life cycle emissions into subnational policy design. Here we develop a building material–energy–emission (BMEE) model to quantify direct, indirect, and embodied CO2 emissions from all building types across 31 Chinese mainland provinces from 2000 to 2060 and to evaluate 50 policy scenarios that combine five strategies: urban renewal, green buildings, low-carbon construction, circular economy, and energy transition. The model links dynamic material flow analysis with energy balance sheet splitting, supported by newly compiled national databases on building material and operational energy intensities, and incorporates a renovation module that prioritizes renovation over demolition. We find that China’s building emissions have peaked around 2017 and can decline to between 0.69 and 2.48 Gt (109 tonnes) CO2 by 2060. Under the lowest-emission pathway, cumulative emissions are reduced by 39.5% relative to business-as-usual, with urban renewal providing the largest contribution to total mitigation, followed by green buildings and energy transition. Public buildings, the material sector, and northern provinces exhibit the largest mitigation potentials, while provincial results highlight distinct strategy priorities. Monte Carlo analysis confirms that these conclusions are robust despite widening parametric uncertainty. Our findings underscore the importance of sectoral coordination and regionally tailored policy packages to maximize building decarbonization in China and provide a scalable framework for other large countries facing concurrent new construction and stock-renewal challenges.
Building decarbonization / Building-Material-Energy-Emission (BMEE) model / Urban renewal / Sectoral coordination / Provincial disparities
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