Gavin Allwright, Secretary General of the International Windship Association, advocates for wind-powered cargo vessels, highlighting their environmental benefits and cost savings. Paul Munro, an Associate Professor in Human Geography, discusses the challenges of off-grid solar solutions in developing countries, including high breakdown rates and e-waste issues. Both guests delve into the promising future of flow batteries, emphasizing their safety, scalability, and potential to transform renewable energy storage while exploring the resurgence of wind energy in maritime transport.