School of Public Policy and Administration, Chongqing University, Chongqing, 400044, China.
J Environ Manage. 2024 Mar;355:120405. doi: 10.1016/j.jenvman.2024.120405. Epub 2024 Mar 2.
Low-carbon cities (LCC) are conducive to low-carbon development and reshaping the urban economic growth model. However, it is still unknown whether it has a synergistic mitigation effect on other greenhouse gases (GHGs). In this study, a dataset comprising 283 Chinese cities spanning the period 2003 to 2019 is chosen. We employ spatial difference-in-difference (SDID) modeling to investigate both the impacts and mechanisms of LCC on GHG emissions performance. The results show that (1) LCC notably lowers local GHG emissions, enhances emission efficiency, and improves GHG emissions performance in neighboring cities within a 1000 km radius. (2) LCC indirectly enhances the GHG emissions performance of local and neighboring cities through energy intensity and green technology innovation. Notably, LCC boosts the local GHG emissions performance by industrial structure upgrading and resource allocation but harms the positive spillover effects on nearby cities due to the siphoning effect. (3) The effect and spatial impact of LCC on GHG emission performance is notably pronounced in eastern cities, non-resource cities, and key environmental protection areas. The results of the study will further promote the development of LCC and provide an important decision-making reference for urban low-carbon sustainability.
低碳城市（LCC）有利于低碳发展和重塑城市经济增长模式。然而，其是否对其他温室气体（GHGs）具有协同减排效应仍不得而知。本研究选取了涵盖 2003 年至 2019 年期间的 283 个中国城市的数据集，采用空间双重差分（SDID）模型，研究了 LCC 对 GHG 排放绩效的影响和作用机制。结果表明：（1）LCC 显著降低了当地 GHG 排放，提高了排放效率，并改善了 1000 公里半径范围内的邻近城市的 GHG 排放绩效。（2）LCC 通过能源强度和绿色技术创新，间接地增强了本地和邻近城市的 GHG 排放绩效。值得注意的是，LCC 通过产业结构升级和资源配置促进了本地 GHG 排放绩效的提升，但由于虹吸效应，对邻近城市的积极溢出效应造成了损害。（3）LCC 对 GHG 排放绩效的影响和空间影响在东部城市、非资源城市和重点环保区域更为显著。本研究的结果将进一步推动 LCC 的发展，并为城市低碳可持续发展提供重要的决策参考。
