I believe this information is very important – it’s the key to the solution of the renewables intermittency issue. https://cleantechnica.com/2022/07/10/converting-mines-into-hydro-powered-batteries/ “”A PUSH facility can be developed using mature technological systems—materials and machinery—used by conventional PSH. In what they call a conservative estimate, researchers determined the US has capacity for between 137 and 285 gigawatts of
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