Agence France-Presse: A major new project is under way in Paris to provide ecologically clean heating for an entire district by extracting piping hot water from nearly two kilometres under the earth. In a revival of the French capital’s geothermal potential, drilling has just begun in the north of the city on a desolate building site sandwiched between the traffic-clogged inner ring road and the Saint-Denis canal. “In Paris we’re trying to adopt a strategy in which France is largely behind other …