Session 1 of TED's Countdown Dilemma Series from June 2022 features scientists, activists, artists, frontline community leaders and more debating the role of carbon credits in a net-zero future. This session focuses on the science of carbon credits, how the current system is failing and various perspectives on how to address these challenges. (Featuring, in order of appearance: Lindsay Levin, David Biello, Bill Sharpe, Gail Whiteman, Eli Mitchell-Larson, James Dyke, Gilles Dufresne, Kavita Prakash-Mani, Susan Chomba, Antti Vihavainen, Olivia Lazard, Gabriel Kra, Tamara Toles O'Laughlin, Benje Williams)