If geothermal energy is a niche source of power in California, then it is in good company. In 2025, geothermal energy generated 10,908 gigawatt-hours (GWh) of electricity in California. That puts it well above biomass (4,226 GWh), and sort of in the ballpark with wind (15,172 GWh) and nuclear (17,575 GWh). California’s biggest sources of […]