[Rockhounds] Gravity batteries in abandoned mines could power the whole planet

[Kreigh Tomaszewski]

Gravity batteries are a potential candidate for storing excess renewable
energy, but finding places to install them is a challenge. Researchers have
proposed that abandoned mines across the globe could be a cost-effective
solution that may also provide jobs.

https://www.techspot.com/news/97306-gravity-batteries-abandoned-mines-could-power-whole-planet.html