For what it's worth, there's a city in the Paris area, Champigny sur Marne, that is well suited for geothermal energy, and has a plant with a second one under c

For what it's worth, there's a city in the Paris area, Champigny sur Marne, that is well suited for geothermal energy, and has a plant with a second one under construction, which provide heating and hot water to the adjacent neighborhoods. Sources in French: https://champigny-reseau-geothermie.fr/ https://champigny-reseau-geothermie.fr/ https://www.champignysurmarne.fr/grands-projets/geothermie https://www.champignysurmarne.fr/grands-projets/geothermie