In this episode of Earthlings 2.0, we sit down with Professor Ed Craig, a longtime sustainability pioneer and CEO of Carbogenics, an Edinburgh-based start-up engineering biochar from difficult-to-recycle organic waste and wastewater screenings. Drawing on decades of experience across academia, policy, and applied climate solutions, Ed breaks down what biochar actually is, how it’s made through pyrolysis, and why it represents one of the most practical and scalable tools for carbon sequestration available today. The conversation also explores how Carbogenics uses engineered biochar to enhance anaerobic digestion, increasing biogas output while locking carbon into stable, long-term storage.