I don't think that is true anymore: https://www.sciencealert.com/scientists-spot-530-000-potential-pumped-hydro-sites-to-meet-all-our-renewable-energy-needs ht

I don't think that is true anymore: https://www.sciencealert.com/scientists-spot-530-000-potential-pumped-hydro-sites-to-meet-all-our-renewable-energy-needs https://www.sciencealert.com/scientists-spot-530-000-potenti...