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Established in 2018, the Climate Security Mechanism (CSM) brings together the UN Department of Political and Peacebuilding Affairs (DPPA), the UN Development Programme (UNDP), the UN Environment Programme (UNEP), and the UN Department of Peace Operations (DPO) as the UN¡¯s dedicated global hub on climate, peace and security. This report summarizes the CSM¡¯s main achievements in 2025 towards advancing peace-positive climate action, catalyzing climate-informed approaches to peace and security, and forging partnerships with actors at all levels.