The floor of the marsh is a thick mat of roots. Marc Jimenez pounds a stake through for anchoring the covering, with (right to left) Bing Liang, Julissa Nunez and Shanon Dempster. It takes about two years for phragmites to die and native species, such as spartina and hibiscus, to start growing back.
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COP31, the 2026 United Nations Climate Change Conference, aims to advance dialogue, strengthen consensus, and accelerate climate action on a global scale. From November 9–20, 2026 in Antalya, Türkiye, heads of state, ministers, scientists, business leaders, and civil society will gather to advance efforts in emission targets, climate finance, and adaptation and resilience. Once again, our experts, students, and global thought leaders from Columbia Climate School and across Columbia University are contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More