Hydropower was long the country’s leading source of renewable energy, but it was passed in 2019 by wind and in 2025 by utility-scale solar. It’s still significant, though, with 5.6 percent of U.S.

Emerging science shows geologic hydrogen, created under the Earth's crust naturally, may exist in pools that can be extracted for clean energy. A U.S. Geological Survey study of where geologic ...

A new floating droplet electricity generator is redefining how rain can be harvested as a clean power source by using water itself as both structural support and an electrode. This nature-integrated ...