What sustainable solutions are there to France's housing crisis?

To live in a dwelling is not just to have a roof over one's head. A dwelling lies at the crossroads of multiple dimensions: cultural, ecological, economic, demographic, political and social. The choice of a dwelling and its location structure daily life, influence access to education, employment, health, cultural offerings… and influence territorial balance, the environment and population geography. With all this in mind, how should we understand the housing crisis in France? And what innovative answers can be brought to bear?