public transit
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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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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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Jacqueline Klopp Helps Public Transit to Grow Sustainably
She’s finding new ways collect and share data in rapidly growing cities — and the results will help to build a healthier future for the entire planet.
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Could Robo-Taxis Kill Public Transportation?
Self-driving cars will fundamentally change how we live and work. But not all of those changes will be positive.
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New York City’s Subways Need Congestion Pricing Now
Charging drivers more could provide much-needed funding for public transit, while reducing traffic and making Manhattan a better place to live and work.
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How to Rethink Urban Transit, and Pay for It, Too
“We have conflated mobility with access, but mobility is not the same as access. The best solution to a transportation problem is to not have to travel. The city itself was invented as a solution to a transportation problem. We have cities so we don’t have to travel.”
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We Need to Finance and Subsidize Mass Transit
While it would be nice to see a mass transit financing solution included in an effort to rebuild the nation’s depleted highway trust fund, a nation that refuses to tax itself to repair deteriorating roads and bridges appears unlikely to provide funding for mass transit. Still, no effort to increase energy efficiency and reduce greenhouse…
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
