Finding old-growth trees that haven’t been disturbed by human activity often requires hiking, kayaking and camping out for days. The only way into Wrangell St. Elias National Park and Preserve in Alaska was by air. The team had to fly in one by one to take samples along the tree line. Photo by Nicole Davi
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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