Pumped-storage hydroelectricity stores energy in the form of water pumped when energy is available from a lower elevation reservoir to a higher elevation one. The energy is recovered when demand is high by releasing the water, with the pump becoming a hydroelectric power generator.
How is the energy stored by pumped-storage hydroelectricity recovered?
{'text': 'by releasing the water, with the pump becoming a hydroelectric power generator', 'answer_start': 203}