Sébastien Treyer holds a background in environmental engineering, a PhD in environment management, and specialises in foresights for environmental policies. He has been in charge of developing foresights at the French ministry for environment, worked as a researcher at AgroParisTech, and is now director of programmes at Iddri (institute for sustainable development and international relations, Paris), a think tank specialised in policy research and negotiations for environmental issues necessitating coordination at the international scale. He has recently been involved in the “Agrimonde” project, producing scenarios about how to feed the world in 2050 in a sustainable way, and also worked on foresights for environmental policies at the local (national parks) or regional level (water basin authorities).