Prof. Dr. Marie Claire Cordonier-Segger is a United Nations Climate Change COP Impact Maker and an award-winning professor and expert jurist. She holds the inaugural Chair in Sustainable Development Law and Policy at the University of Cambridge and is a Law Fellow and Director of Studies at Lucy Cavendish College. She is also the Senior Director of the Centre for International Sustainable Development Law (CISDL), Chair of the UNFCCC Climate Law & Governance Initiative, and serves in numerous leadership roles with global sustainability organizations.

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Meet the 2025 Impact Makers transforming our world
The Impact Makers initiative celebrates individuals driving real change in the fight against climate change, showcasing innovative solutions across diverse sectors

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