Climate change: ‘Sand battery’ could solve green energy’s big problem – BBC News

Brillant, groundbreaking stuff. A fresh and simple way of solving the energy crisis and managing a mixed grid of alternative energy sources (wind and solar) to avoid collapse at different seasons (especially winter). Two young Finnish researchers seem to have come up with a working, viable and commercial “sand battery”.

https://www.bbc.com/news/science-environment-61996520

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