Revolutionary Approach Tackles Both City and Supply Chain Emissions

With the acceleration of global warming, achieving the objectives outlined in the Paris Agreement has become imperative. Cities, particularly in nations such as China, are pivotal in the effort to diminish carbon emissions.

Graphical abstract. Image Credit: Environmental Science and Ecotechnology.

Nevertheless, conventional methods for rendering cities carbon neutral often overlook indirect emissions beyond city boundaries, a crucial aspect of a holistic carbon reduction strategy.

This study addresses this gap by introducing an integrated framework that comprehensively considers both emissions generated within and those associated with consumption by a city.

Recent research presented an inventive framework for attaining carbon neutrality in urban settings. The study was published in the journal Environmental Science and Ecotechnology. Concentrating on Wuyishan, a service-oriented city in Southern China, the study underscores the significance of inclusive strategies that account for internal and external greenhouse gas (GHG) emissions to efficiently mitigate carbon.

This study unveils a pioneering strategy for achieving urban carbon neutrality, using Wuyishan, a service-oriented city in China, as a paradigm. The approach introduces a comprehensive methodology for quantifying and mitigating greenhouse gas (GHG) emissions, emphasizing the significance of often-neglected out-of-boundary emissions, constituting 42% of Wuyishan's total emissions.

This innovative approach seamlessly integrates life cycle assessments with sector-specific analyses, encompassing all facets of a city's emissions. In Wuyishan, the mitigation strategies encompass expanding solar power, transitioning to electric vehicles, and enhancing agricultural practices.

The study underscores the importance of addressing both internal and external sources of emissions to formulate effective carbon reduction strategies. This is particularly crucial for cities in developing countries, confronting distinctive challenges and opportunities for sustainable growth amid rapid urbanization and industrial changes.

By aiming to substantially enhance renewable energy and electrification by 2035, Wuyishan showcases a robust dedication to a sustainable, low-carbon future. The findings of this research provide a valuable blueprint for cities globally, offering guidance on the development of comprehensive and pragmatic carbon neutrality plans.


  • The proposed framework delves into the city-level carbon neutrality pathway.
  • The research adopts a comprehensive greenhouse gas (GHG) emission perspective.
  • Equal emphasis is placed on carbon reductions within and outside the city's boundaries.
  • The scientists recommend incorporating out-of-boundary emissions into GHG accounting.

The researchers underscored the significance of this integrated approach. “Our methodology provides a practical tool for cities, especially in developing countries, to develop effective carbon neutrality roadmaps that encompass the full spectrum of GHG emissions,” they noted.

This framework offers a comprehensive model for cities to formulate and implement strategies towards achieving carbon neutrality. It underscores the imperative of accounting for external emission sources and highlights the importance of transitioning towards low-carbon technologies and sustainable practices across diverse sectors including energy, transportation, agriculture, and waste management.

Journal Reference:

Zhang, Z., et al. (2024). Expanding carbon neutrality strategies: Incorporating out-of-boundary emissions in city-level frameworks. Environmental Science and Ecotechnology.

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