“We just got some massive news in the ongoing drive to switch to renewable energy: scientists have identified 530,000 sites worldwide suitable for pumped-hydro energy storage, capable of storing more than enough energy to power the entire planet.

Pumped-hydro is one of the best technologies we have for storing intermittent renewable energy, such as solar power, which means…”

Source:
https://www.sciencealert.com/scientists-spot-530-000-potential-pumped-hydro-sites-to-meet-all-our-renewable-energy-needs