At the 2025 UN Climate Summit, nations push for stronger action to limit warming to 1.5°C, urging fossil fuel phase-out and increased climate finance.

At the 2025 UN Climate Summit in Belem, Brazil, momentum is building for stronger global climate action as negotiators shift from focusing solely on implementing past pledges to addressing the growing gap between current national plans and the 1.5°C warming limit. Despite no formal agenda items for new targets, pressure from nations like Palau and leaders including President Lula da Silva is driving calls for a final communiqué with strong language on phasing out fossil fuels and boosting climate finance. While existing pledges from 116 countries still project a 1.7°C rise, observers note increased political will and a possible high-level outcome, with ministers set to make key decisions in the final days.