With its energy rehabilitation project for 81 dwellings, M C meets specific objective 2.1: Promote energy efficiency measures and reduce greenhouse gas emissions and Action 2: "Energy rehabilitation of social housing (public park)". M C thermally rehabilitates a heritage composed of 81 individual dwellings built in the 1920s. The project consists in thermally insulating mining dwellings, insulating lost attics, changing exterior joinery, changing the mode of central heating, installing a VMC, with the aim of switching from an energy label F to a label C.