The environmental master plan for the Ile-de-France region (Sdrif-E) is currently subject to public inquiry until March 16. A section on social housing crystallizes all the tensions between the elected representatives of the majority and the opposition.

With 50% social housing, the mayor of Guyancourt (Yvelines) believes that his city is directly affected by the project. "It keeps us busy all the time, almost daily,” reacts the 54-year-old elected official.