The emergence of renewable energy like wind and solar as a viable alternative to oil, gas and other fossil fuels has raised critical questions about which form of power offers the best value today — a ...

Enhanced geothermal energy is one of the lesser-known forms of clean renewable power, and it hit a milestone last week. The utility company Southern California Edison signed a 15-year purchasing ...

Correction: This story has been updated to accurately reflect the current cost of next-generation geothermal energy. Advances in oil and gas drilling have cut costs for a form of clean power that ...