Attendees walk in front of the main entrance to the COP30 UN Climate Change Conference in Belem, Para State, Brazil on November 10, 2025. The COP30 runs from November 10 to 21, and the 50,000 participants will feel the heavy, humid air of the Amazon rainforest, and face the daunting task of keeping global climate cooperation from collapsing.. (Photo by MAURO PIMENTEL / AFP)