This lecture features an interview with Benoît Cousin, a civil engineer specialized in energy from EPFL, discussing Geo-AG, a startup focusing on geothermal energy integration in foundations and underground structures. The company aims to reduce greenhouse gas emissions and financial costs by combining geothermal systems with infrastructure. Geo-AG has already implemented projects in Monaco, Paris, Seoul, and EPFL campus, with a focus on expanding in the Swiss economic landscape.