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A comment on Gravity Energy Storage: Alternative to batteries for grid storage. Parent comment

Re:Gravity Energy Storage: Alternative to batteries for grid... by rossjudson on Tuesday January 05, 2021 @10:09PM (#25654309)
The new thing I read there was the use of old abandoned mine shafts, providing up to 1km of vertical distance with a 5000 tonne mass. There are a lot of abandoned mine shafts. Does it work?
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