urban trees
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New York City’s Greenery Absorbs a Surprising Amount of Its Carbon Emissions
A hyper-local study of vegetation shows that the city’s trees and grass often cancel out all the CO2 released from cars, trucks and buses on summer days.

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

