Thomas Porcher has a PHD in economics and is a professor at PSB. He was an expert in the national debate on energy transition and was part of the working group of the C. Lepage mission for the economic transition at the ministry of ecology. He is the author of Le Mirage du gaz de schiste (Max Milo, 2013). Henri Landes, Franco-American, is a lecturer at Sciences Po and co-founder of the climates association, of which he was president.