It's a neat extension to the concept of using water towers or higher-altitude reservoirs for similar effect: https://en.wikipedia.org/wiki/Pumped-storage_hydro

It's a neat extension to the concept of using water towers or higher-altitude reservoirs for similar effect: https://en.wikipedia.org/wiki/Pumped-storage_hydroelectricity https://en.wikipedia.org/wiki/Pumped-storage_hydroelectricit...