From Europe to North America, an energy revolution is breathing new life into empty, long-forgotten coal mine shafts—by repurposing them into places to store renewable energy. Using "gravity batteries ...

After years of research and a prototype built in an industrial warehouse, a renewable energy company has signed a deal it hopes will make it the first company in the world to turn a disused mine shaft ...

The industrial foundations of Cumberland run deep. ACET researchers are determining how these now-abandoned coal mines under the village could generate geothermal energy to heat and cool buildings.

Elk Creek is the first methane-to-energy project at a coal mine west of the Mississippi and the largest of its kind nationwide. Aspen Skiing Company In a Colorado valley where miners have harvested ...