Urbanization12
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Climate Migrants Will Soon Shift Populations of Many Countries, Says World Bank
If emissions of greenhouse gases remain high, as many as 143 million “internal migrants” might move within their own countries by 2050.
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California’s Misguided Attempt to Force Urban Density
Government should encourage urban living by making it more affordable and attractive, and provide incentives for density; it should not try to mandate it.
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The Mass Transit Man
Thomas Abdallah, adjunct professor at Columbia University, is working to make the NYC subway system more sustainable.
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Planting a Park on the Cross-Bronx Expressway Would Save Money and Lives
Public health researchers run the numbers on creating a park on top of a section of the highway, finding it a worthwhile investment for community health.
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So Much Depends on a Tree Guard
Adding protective barriers around street trees could reduce load on city sewers, study finds.
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Sustainability Measurement in China: Fostering a Race to the Top
The Research Program on Sustainability Policy and Management recently released the China Sustainable Development Indicator System, a new sustainability indicator framework and annual ranking of the sustainability performance of Chinese cities.
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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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Main Streets, Malls, and Sustainable Consumption
As new technologies continue to change consumption patterns, land use and social norms, we have an opportunity to ensure these changes result in an exciting sustainable lifestyle in a new type of sustainable city.
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NASA Finds New Way to Track Ozone By Satellite
Ozone pollution near Earth’s surface is one of the main ingredients of summertime smog. But it not directly measurable from space, due to the abundance of ozone higher in the atmosphere, which masks the surface. Now, researchers have devised a way to use satellite measurements of the precursor gases that contribute to ozone formation to…
AGU25, the premier Earth and space science conference, takes place December 15-19, 2025 in New Orleans, Louisiana. This year’s theme—Where Science Connects Us—puts in focus how science depends on connection, from the lab to the field to the ballot box. Once again, Lamont-Doherty Earth Observatory and Columbia Climate School scientists, experts, students, and educators are playing an active role, sharing our research and helping shape the future of our planet. #AGU25 Learn More
