Working with what already exists, recycling soil, using resources sparingly and caring for objects that we want to be more reversible and less fixed in their uses... are some of the more challenging objectives of contemporary urban planning. For its past Olympic city and historical citizens’ movements about local governments, Grenoble is a perfect place to discuss these topics. PhD candidates will be accompanied to think about how approaching reversibility, ecology and care in planning needs to improve methodological tools for in vivo and contextualized knowledge of territories.