Solar and Wind need exponential energy storage growth. Why UPHS is our best hope [pdf]

One more thing.. For quick vetting that this idea is legit:

Here is the original research paper where I source more of my info:

Underground pumped hydroelectric storage Allen, R.D., Doherty, T.J., and Kannberg, L.D., for the Pacific Northwest Laboratory, sponsored by the United States DOE https://www.osti.gov/biblio/6517343

Author here,

Yesterday I posted my full research report on this topic. I wanted to also post this short summary presentation which explains this technology.

Here is my post for the full version if anyone would be so kind as to help spread the word. https://news.ycombinator.com/item?id=20690640

Peace, love, and climate stability, Eric