Geothermal could be huge, why isn't it?

Brock Yordy once helped extract fossil fuels; now, he’s using the same skills to tap the Earth’s heat for clean energy. His journey from oilfields to geothermal puts a new spotlight on a big question: can the industry that drove emissions now lead the way in reducing them? And if there’s so much power beneath our feet, what’s holding geothermal back?