The 6th Cargèse summer school will be jointly organized by CNRS, NSF, the university of Rennes and the university of Oslo. It will take place from June 10 to June 21 2024 at the Cargese Institute, Corsica, France. The summer school will provide high-level interdisciplinary training on porous and fracture media processes. This 6th summer school will more particularly focus on life supporting functions of the subsurface at interfaces between hydrology, geophysics and biological processes. By combining lectures and research seminars, the summer school is designed to be accessible to participants with a broad range of backgrounds.