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A comment on Ditch the Batteries: Off-Grid Compressed Air Energy Storage. Parent comment

Re:Ditch the Batteries: Off-Grid Compressed Air Energy Storage by newman8r on Thursday May 24, 2018 @10:27AM (#17144270)
https://caes.pnnl.gov/ - it's an interesting project. Apparently it's more like 'underground caverns' than caves.
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