In this episode of the Fletcher Forum Podcast, host KP sits down with Professor Nigel Purvis - veteran climate diplomat and CEO of Climate Advisers, to explore the future of global climate action. From the early days of the Kyoto Protocol to the road ahead for COP-30 in Brazil, Professor Purvis shares insights on the shifting role of the U.S., the rise of non-state actors, and lessons from decades of negotiation. Whether you're a student, policymaker, or climate advocate, this conversation offers both a candid reflection on the past and a hopeful look toward what comes next in climate governance.