The French Ligue de Protection des Oiseaux (LPO) or Bird Protection League, a well-known non-governmental organisation founded a one hundred ago, has developed a programme entitled "Refuge Balcon" that seeks to reintroduce biodiversity in towns and cities for the benefit of local communities.
Nacarat, a real estate promotion subsidiary of the Rabot Dutilleul group, works with the LPO to design residential buildings that comply with the principles of its «Refuge Balcon» programme.