New commercial buildings already have to have solar (or plants) on their roofs: https://www.architectmagazine.com/technology/france-mandates-green-roofs-for-all

New commercial buildings already have to have solar (or plants) on their roofs: https://www.architectmagazine.com/technology/france-mandates-green-roofs-for-all-new-commercial-construction_o https://www.architectmagazine.com/technology/france-mandates...