In this provocative and hopeful talk, sustainability expert Mike Berners-Lee explores how truth—across politics, media, and business—is the most powerful lever we have to address the polycrisis. Drawing on insights from his latest book, A Climate of Truth, Professor Berners-Lee unpacks the layers of the global challenges we face and reveals how misinformation, denial, and distraction hinder meaningful action. He argues that we already possess the technology and knowledge to live more sustainable, more meaningful lives —but only if we raise our standards of honesty and accountability. With clarity and urgency, he invites audiences to become truth-tellers and system-changers in the fight for a better future.