> The development of medium-deep (>400 m) and deep geothermal reservoirs (> 1,500 m) could be a partial solution to provide renewable heat to single buildings, residential or commercial neighbourhoods, or districts of the city of Aachen via the existing district heating network.

It has Cold War origins to be sure, but what kind?

I suspect American intelligence has been supporting the anti nuclear movement for some time, for non-proliferation reasons - and not just in Germany. I certainly would be, if I ran the State Department.