Compression of air in underground cavities > Hydrostor, which is based in Toronto, is one of several startups working on fixing those problems. The company say

Compression of air in underground cavities > Hydrostor, which is based in Toronto, is one of several startups working on fixing those problems. The company says it’s figured out a way to capture and reuse the heat generated when air is compressed, eliminating the need to burn gas. It’s also figured out a way to make the mechanics work in areas where caverns must be dug out of hard rock, rather than salt. < https://www.latimes.com/environment/newsletter/2023-01-12/this-giant-underground-battery-is-a-1-billion-clean-energy-solution-boiling-point https://www.latimes.com/environment/newsletter/2023-01-12/th...