Urbanization4
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Christine Appah-Gyamfi Empowers Students to Lead on Environmental Justice Issues
In her class at the Columbia Climate School, this environmental justice lawyer provides tools and hands-on opportunities for her students to generate real-world impacts.
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Viewing Urban Geography and History Through an Environmental Justice Lens
A Q&A with John Williams, who studies the historical links between the built environment and racial injustice in U.S. cities.
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Opinion: Why Environmentalists Should Oppose ‘Cop City’ and Defend the Atlanta Forest
A Sustainability Management graduate student discusses questions of environmental injustice in Atlanta, Georgia, as one county prepares to turn a large greenspace into a police training facility.
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People Like to Breathe: The Importance of EPA’s New Air Particulate Proposal
In the United States, we need strong pollution control standards that are enforced carefully, precisely, and with a deep understanding of the pace of operational change that is feasible for a particular business or locality.
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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.
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New York City’s Dynamism is Why Our City Will Not Fail
Diversity and tolerance comprise the secret sauce that fuels New York City’s creative and economic dynamism.
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There Are, in Fact, Fish in the Hudson River
The river — much like post-pandemic New York City — is more resilient than people think.
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What City Planners Can Learn From Hurricane Sandy
Based on a decade of data from Hurricane Sandy, two New York City planners explore the inequities of disaster mitigation and recovery — and what needs to change to prevent climate gentrification.
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Data Dive: NYC Traffic Trends, Street Safety and Public Health
Professor Peter Muennig discusses the state of New York City’s streets, and what could be done to make them safer.
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
