Xavier Arnauld de Sartre is a geographer and a researcher at CNRS, in the Passages laboratory, in Pau. His research focuses on the place of people in the face of policies that aim to mitigate global change and impulse transitions. After having worked on fields where these issues are posed with particular strength (the Amazon, the Argentinian Pampas), he is now working on French sites, studying in particular the case of the agroecological transition and the energy transition. He holds a chair entitled « Territories in Energy and Environmental Transitions », which is particularly interested in the territorial dynamics that are implemented around these processes.