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Transportation not only provides support for economic and social development, but also has an important impact on emissions. Based on the DPSIR model, the constraint index system of transportation carbon emissions in the Pearl River Delta under ‘Dual carbon’ is constructed, and the hierarchical structure model is constructed by using the DEMATEL-ISM integration method. The constraint mechanism of transportation carbon emission in the Pearl River Delta is analyzed from the three dimensions of the correlation and importance, system hierarchical structure and constraint path of the constraints. The study found that there are six levels of constraints. The economic development level, carbon emission scale and the ‘Dual carbon’ goals are the core factors of the entire system. Developing public transport and intelligent transportation and increasing investment in new energy infrastructure and technology are conducive to the development of transportation in the Pearl River Delta and the realization of ‘double carbon’ goals.

In light of the urgent need to combat climate change and attain carbon neutrality, the development of blue carbon has emerged as a pivotal strategy for the global community. This approach offers significant potential for both mitigating and adapting to the impacts of climate change. As a result, international collaboration on blue carbon initiatives has become a focal point in the worldwide response to the climate crisis. China, blessed with extensive blue carbon resources, recognizes the development of these ecosystems as a critical component in its efforts to make a substantial contribution to the global endeavor to curb climate change and achieve sustainable environmental goals. This article offers a comprehensive analysis of China’s opportunities and challenges in international blue carbon collaboration. Despite its vast potential, China faces significant hurdles, including the degradation of blue carbon ecosystems, a delayed start in implementing blue carbon practices, and inconsistencies in the blue carbon standard system. To enhance its participation in global blue carbon initiatives, China should pursue several key strategies, including preserving and restoring its blue carbon ecosystems, strengthening domestic protection and application mechanisms, promoting the construction of an international blue carbon system, establishing a scientific cooperation platform to facilitate capacity building and technology transfer and advocating for an international blue carbon market trading mechanism. By prioritizing these key areas, China can simultaneously foster domestic blue carbon conservation and development while solidifying its role as a pivotal contributor to global climate change mitigation efforts.

Transportation not only provides support for economic and social development, but also has an important impact on emissions. Based on the DPSIR model, the constraint index system of transportation carbon emissions in the Pearl River Delta under 'Dual carbon' is constructed, and the hierarchical structure model is constructed by using the DEMATEL-ISM integration method. The constraint mechanism of transportation carbon emission in the Pearl River Delta is analyzed from the three dimensions of the correlation and importance, system hierarchical structure and constraint path of the constraints. The study found that there are six levels of constraints. The economic development level, carbon emission scale and the 'Dual carbon' goals are the core factors of the entire system. Developing public transport and intelligent transportation and increasing investment in new energy infrastructure and technology are conducive to the development of transportation in the Pearl River Delta and the realization of 'double carbon' goals. [ABSTRACT FROM AUTHOR]