President Barack Obama briefs European leaders, including Danish Prime Minister Lars L. Rasmussen, following a meeting at the United Nations Climate Change Conference in Copenhagen, Denmark, December 18, 2009. (Source: Official White House Photo by Pete Souza)
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During COP30—the 2025 UN Climate Change Conference taking place November 10–21 in Belém, Brazil—experts from Columbia Climate School and Columbia University will be contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More