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A German Experiment Proved That Simple Concrete Spheres Make Fantastic Batteries. Now, California Plans To Submerge A 9-Meter Diameter Sphere In The Ocean And Is Already Planning Versions Of 30 Meters (farmingdale-observer.com)

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[-] [email protected] 7 points 2 months ago

Says on the wiki 2.7 meters thick

this post was submitted on 11 May 2025

194 points (97.1% liked)

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