Geothermal energy has been slow to contribute to Germany’s Energiewende, or clean energy transition. But this is changing. Bavaria has 20 deep-well plants and more in planning. Now its neighbor state in the south, Baden-Wuerttemberg, is picking up the thread. Deep geothermal energy is to become a cornerstone of its effort to achieve climate goals that are even more determined than Germany’s national plans – and currently in danger of falling short. Paul Hockenos has the story.