Prof. Mar Reguant's presentation addresses the challenges and successes in the energy transition, with a focus on the decarbonization of the electricity sector, which is a major contributor to CO2 emissions and the one in which most progress has been made. She highlights the key challenges, including the intermittency of renewable energy sources like wind and solar, outdated infrastructure, and the persistence of stranded assets such as coal plants. Drawing from her research, Prof. Reguant discusses case studies from Spain, Chile, and the US, exploring the costs of intermittency, the role of market design, and the benefits of infrastructure expansion in integrating renewable energy. She also examines how regulatory structures in the US delay the retirement of fossil fuel assets. While she emphasizes the potential of renewable energy, Prof. Reguant underscores the importance of addressing these challenges to ensure a successful transition to a low-carbon future.