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World leaders open High-Level Week at UNGA 81 in New York with a major focus on climate costs, fossil-fuel transition, and energy security. UN Secretary-General António Guterres urges all governments to adopt binding fossil-fuel phase-out plans aligned with the 1.5°C target and calls for oil profits to fund climate adaptation. Developing countries push for tripled adaptation finance and a stronger polluter-pays model. On the sidelines, leaders discuss protecting Ukraine’s energy grid, stabilizing global energy markets, and launching the Partners for Multilateralism initiative.
Monday, 21 September, 2026