C40

C40 is a global network of nearly 100 mayors from many of the world’s leading cities, united to drive urgent action on the climate crisis. Founded in 2005, C40 brings together cities representing around one twelfth of the world’s population and a quarter of the global economy. Its core mission is to support cities in halving their greenhouse gas emissions by 2030, thereby helping to limit global warming to 1.5°C and building more climate-resilient, healthy, and equitable urban environments. The organisation operates through a collaborative, science-based approach, offering direct technical assistance, facilitating the exchange of best practices, and harnessing research and communication to empower urban leaders. C40’s activities span areas such as water management, energy efficiency, public health, and the creation of green jobs. It places a strong emphasis on equity and climate justice, integrating these priorities into all its climate action plans. C40 membership is performance-based, with cities required to meet rigorous climate leadership standards that are regularly reviewed. The network provides a platform for cities to share solutions and advocate for stronger support from national governments and the private sector. C40 is governed by a steering committee comprised of current mayors, with leadership currently including the mayors of London and Freetown, and backed by an experienced executive team. Through its work, C40 positions cities as global leaders in climate action, demonstrating that ambitious change is possible and essential for a sustainable future.