Bonn Climate Talks Open with Adaptation and Fossil Fuel Transition in Focus

The 64th session of the UNFCCC Subsidiary Bodies (SB64) opened in Bonn as the first major multilateral climate meeting since COP30 in Belém, with adaptation finance, fossil fuel transition and implementation of past commitments set as core priorities. UNFCCC Executive Secretary Simon Stiell called for faster climate finance access and measurable progress on adaptation indicators.

SB64 represents the primary preparatory process for COP31, to be held in Türkiye later in 2026. Delegates are tasked with advancing technical work on the Global Stocktake outcome mandating a transition away from fossil fuels, strengthening adaptation frameworks and resolving procedural questions on the new collective quantified goal for climate finance. UNFCCC Executive Secretary Simon Stiell issued a call for urgency on all three tracks, warning that slow progress in Bonn would constrain ambition at COP31.

Civil society organisations attending the Bonn sessions have placed debt burdens, adaptation finance accessibility and equitable Global South pathways at the centre of their demands. With geopolitical tensions elevated and several major donor countries under domestic budget pressure, the gap between what developing nations require for climate adaptation and what is available through international channels remains wide. Observers note that the increasingly fractured geopolitical environment makes consensus harder to achieve at exactly the moment when the science calls for greater action.

SB64 carries special significance because the outcomes of these subsidiary body sessions typically determine what issues are mature enough for ministers to resolve at COP. If technical texts on fossil fuel transition timelines and adaptation finance remain contested in Bonn, COP31 in Türkiye could face a compressed and more contentious agenda. Stakeholders from India and other large developing economies are expected to push hard for defined finance commitments alongside any agreed fossil fuel phase-down language.

Key figure — SB64 (64th Subsidiary Body sessions), June 2026