The town of Staufen im Breisgau drilled down to pull up geothermal energy to heat buildings and be green. But the drilling pierced a barrier and is allowing ground water to rise into a layer of anhydrite, which turns into gypsum when in contact with water. And the gypsum expands in the process. The town has lifted between a few centimeters in some sections to over two feet. The centuries old buildings are falling apart. But they’re green!