Copenhagen 20095
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Cities Can Lead Nations
By Cynthia Rosenzweig At the Copenhagen climate summit, nations must answer a call for action—but local governments may help show the way. Climate change is no longer predicted; it has arrived. A plethora of studies shows that global changes in physical and biological systems are being caused by human-induced warming. Building on the 2007 Intergovernmental…
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Our Leaders Can Run, But They Can’t Hide
As the nations of the world prepare to meet in Denmark, there is some well publicized noise being emitted to lower expectations for a climate treaty. The United States and China—the two largest emitters of greenhouse gases, with over 40% of the world’s pollutant load–appear to be at the center of this effort at political…
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