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To attain China's target of carbon neutrality by 2060, the implementation of the Energy Consumption Trading (ECT) system serves as an effective approach to improve energy efficiency and mitigate CO 2 emissions. Nevertheless, it is crucial to consider not only the importance of carbon reduction effect caused by ECT system but also the associated cost. Therefore, this paper applies the spatial difference-in-differences (SDID) model to assess the direct and spillover impacts of the ECT policy on the carbon abatement cost, which is measured by shadow price of CO 2 emissions and calculated using SBM-DEA model. Panel data encompassing 279 Chinese cities from 2010 to 2019 are employed for analysis, with additional insights provided through heterogeneity and mechanism analyses. The results show that ECT policy increases the local carbon abatement cost in pilot cities but decreases the cost of surrounding cities. Meanwhile, such a declination effect in neighboring cities with a spatial attenuation boundary of 1000 km. The heterogeneity analysis suggests that the implementation of ECT policy leads to an increase in the carbon abatement cost in cities located in non-Eastern Coastal regions, cities with abundant natural resources and cities with small populations. The mechanism analysis indicates that the ECT policy implementation facilitates the improvement of green technology in the neighboring cities of the pilot project, consequently lowering the carbon abatement cost. Besides, this policy also results in a decrease in the carbon intensity of the pilot cities. Owing to the U-shaped association between carbon intensity and the carbon abatement cost, the policy implementation stimulates an increase in the cost within the pilot cities. • This paper estimates the carbon abatement cost (MAC) using SBM-DEA method. • The SDID model is used to investigate the impacts of ECT policy on carbon MAC. • We test whether green technology and carbon intensity are mediating variables. • ECT policy increases the carbon MAC in pilot cities through carbon intensity. • ECT policy lowers the carbon MAC of adjacent cities through the green technology. [ABSTRACT FROM AUTHOR]

• Evaluation for urban green land use efficiency (UGLUE) of resource-based cities. • The UGLUE has experienced a trend of first fluctuating and then improving. • Industrial upgrading, financial development and technological innovation are main factors. • Spatial-temporal heterogeneity in the impact of different factors on UGLUE. The green use of urban land has become a key for the sustainable transformation of resource-based cities. This paper selects 116 Chinese resource-based cities to construct an evaluation system for urban green land use and measure its efficiency. Secondly, it identifies driving factors affecting urban green land use efficiency (UGLUE) and comprehensively analyze the heterogeneity of these factors. The important findings of this paper include: (1) The UGLUE of resource-based cities in China has experienced a trend of first fluctuating and then improving. However, there are obvious regional differences. The UGLUE in the eastern and western regions are higher than those in the central and northeastern regions. (2) Industrial upgrading, financial development and technological innovation are key factors affecting UGLUE in resource-based cities. (3) There is significant heterogeneity in the impact of different factors in different city types, different regions and different time periods. The land use in resource-based cities should transform from blind expansion in pursuit of short-term economic benefits to a green development that pursues the coordination of economic, social, and ecological benefits based on the local conditions. [ABSTRACT FROM AUTHOR]

Carbon lock-in has become a major obstacle to green development in all countries, and carbon unlocking (CUL) is of great significance in accelerating the process of carbon neutrality worldwide. Based on the panel data of 292 prefecture-level cities in China from 2006 to 2020, this paper constructs a PSM-DID model based on machine learning to empirically test the impact of LCCP policy on urban CUL. The regression result shows that the low carbon city pilot (LCCP) policy significantly increases the level of CUL by 1.25 % in the pilot cities, which is still valid after range of robustness tests, and the mechanism analysis shows that green innovation and green habits are important ways for the policy to affect CUL. Based on the generalized random forest (GRF) algorithm, we further find that the policy can increase the CUL level by 0.6 %, and the average treatment effect (ATE) of the sample is concentrated between 0.004 and 0.006, which exhibits obvious heterogeneity. This paper chooses population quality, openness level and industrial structure as heterogeneous factors, which are finally found to have a U-shaped or inverted U-shaped relationship with ATE. This study provides useful insights for China and other countries to break the carbon lock-in and realize green development. • Low-carbon city pilot policy can effectively promote urban carbon unlocking. • Causal forest model is used for causal inference based on generalized random forests algorithm. • The propensity score is calculated by machine learning. • Generalized random forest is used for heterogeneity analysis. • Low-carbon city pilot policy transmits policy effects through green innovation and green habits. [ABSTRACT FROM AUTHOR]

Environmental protection and sustainable development are now profoundly ingrained in the public consciousness in the modern era of the global green revolution. First, this paper uses an evolutionary game model to theoretically analyse the impact of environmental regulation and green finance on enterprises by dissecting the game behaviour between local governments, banks and enterprises. Then, we incorporate entrepreneurial spirit into the model to determine whether entrepreneurial spirit accelerates the achievement of green sustainability objectives. Environmental regulation and green finance are found to contribute substantially to the innovation of green technologies by local enterprises, while entrepreneurial spirit accelerates this process. Finally, we empirically test the findings based on a prefecture-level panel dataset from 2007 to 2020. We find that green finance has a positive impact in Central and Western cities of China, while Eastern cities are in greater need for government environmental regulation controls. For entrepreneurial spirit, the incentive effect of entrepreneurial spirit on the level of green technology innovation is more significant in Central and Western regions of China. This paper enriches the field of research on entrepreneurial spirit and regional green sustainable development by providing empirical evidence for the evaluation of environmental regulatory and green financing policy impacts. [ABSTRACT FROM AUTHOR]

• This paper explores the effect of green finance on SDGs. • GFPZ significantly promotes SDGs. • Green finance indirectly affects SDGs through technological innovation. • The impact of green finance on SDGs exhibits heterogeneity. In pursuit of actively advancing energy transformation, ensuring the attainment of carbon peak and carbon neutrality objectives, and fostering sustainable development, China has dedicated substantial efforts. This article treats the Green Finance Reform and Innovation Pilot Zones (GFPZ) as a quasi-natural experiment, thereby constructing an analytical framework for evaluating the impact of green finance on achieving Sustainable Development Goals (SDGs). We empirically investigate this impact by analyzing data from 316 cities in China spanning the period from 2011 to 2020, employing a difference-in-differences (DID) model. The study suggests a gradual improvement in the level of sustainable development in China. Moreover, green finance contributes to SDGs, and the conclusion is robust. Further investigation reveals that green finance improves sustainable development by fostering technological innovation. Heterogeneity results indicate that the influence is notably more pronounced in western regions and locales characterized by stringent environmental regulations. This article offers fresh perspectives on achieving SDGs. [ABSTRACT FROM AUTHOR]

In the context of the current ecologicalization of social policies, the National Marine Ecological Civilization Construction Demonstration Zone led by the Chinese government is not only a carrier of marine ecological civilization construction, but also a test field for building a maritime power and promoting the sustainable development of the marine economy and society. This paper considers the establishment of the demonstration zones as a "quasi-natural experiment". Utilizing panel data from 53 prefecture-level and above cities in China from 2006 to 2020, a time‑varying difference‑in‑difference model is applied to examine whether this ecological policy can promote the elevation of green development levels of the marine economy, aiming to achieve a harmonious balance between "clear waters and green mountains" and "mountains of gold and silver". The results indicate that the establishment of the demonstration zones significantly enhances the level of green development of the marine economy. Technological innovation and industrial structure are identified as two crucial mechanisms influencing green development of the marine economy, both exhibiting positive mediating effects. The impact of the establishment of the demonstration zones on the promotion of green development of the marine economy is more pronounced in the East China coastal region and the Central-south coastal region compared to the North China and Northeast coastal regions. Additionally, this policy effectively stimulates green development of the marine economy in medium and small cities and non-resource-based cities. Finally, corresponding policy recommendations are proposed from the perspectives of differentiated strategies, industrial structure adjustments, and technological innovation mechanisms. [ABSTRACT FROM AUTHOR]

We try to expand the political promotion tournaments in Chinese local governments from raising GDP to the level of increasing fiscal revenues. From the vantage point of officials' performance appraisal, we investigate the impact of local government officials' political ambitions, represented by the ex-ante commitment level of fiscal revenue targets, on carbon emission intensity (CEI). Utilizing a sample of 209 prefecture-level cities in China spanning 2006 to 2019, this paper empirically scrutinizes the influence of local government political ambition on CEI. The findings reveal that the greater the political ambition of local government officials, the more pronounced the reduction in CEI. Furthermore, our study demonstrates that political ambition contributes to the decline of CEI by elevating the levels of environmental attention and green innovation. This research not only aids in comprehending the rationale and necessity of the political promotion tournaments implemented by the Chinese central government but also offers valuable insights for other developing countries seeking to mitigate CEI. [ABSTRACT FROM AUTHOR]