Professors Coral Calero Muñoz and Felix Garcia discuss green and sustainable software, emphasizing why it matters in the context of global warming. They explore terminology and concepts related to green software, the challenges of measuring energy consumption, the impact of programming languages on energy efficiency, and the connection between energy consumption, software speed, and AI. They also tackle the challenges and future of green software engineering, the importance of government action, and the issue of 'green washing' in the software industry.