Urbanization2
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Toxic Legacies and Transformative Learning: MPA-ESP Students Explore the Gowanus Canal
In June, a group of students stepped out of the classroom and into one of New York City’s most environmentally complex sites.
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How AI Is Revolutionizing the Recycling Industry
Modern waste facilities are incorporating AI into their systems, using robots guided by AI vision systems and machine learning algorithms, high resolution cameras, hyperspectral imaging, near-infrared sensors and predictive analytics.
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All of the Biggest U.S. Cities Are Sinking
From the coasts to the interior, urban areas are sinking. The main culprit: pumping of groundwater.
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How Congestion Pricing Will Benefit New York City
Congestion pricing is already delivering results, but what can New Yorkers expect in the months to come?
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Reviving Nature in the City: Lessons From Urban Green Space Restoration
MPA-ESP students took field trips to Pelham Bay Park and Shirley Chisholm State Park to learn more about the importance of preserving urban green spaces.
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Urban Ecology in Action: Field Lessons From Randall’s Island to Bronx Park East
On a field trip to Randall’s Island, River Park and Bronx Park East, MPA-ESP students saw first-hand the complex balance needed to maintain and restore natural environments within a dynamic urban setting.
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Study Finds Subway Pollution Is Too High—With a Disproportionate Effect on Black and Hispanic Riders
Columbia Climate School researcher Shams Azad analyzed the air pollution on subway platforms and trains in New York City.
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Highlights from “Climate and Environmental Justice in Harlem”
On August 7, a diverse group of practitioners and community leaders gathered to discuss environmental justice in Harlem and other historically disadvantaged communities.
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Planting Some Tree Species May Worsen, Not Improve, NYC Air, Says New Study
New York is planting large numbers of trees in order to improve the city’s livability. But emissions from some species interact with tailpipe and building pollutants to form smog.
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
