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A comment on Solar and Wind Energy May Be Nice, but How Can We Store It?. Parent comment

Re:Solar and Wind Energy May Be Nice, but How Can We Store It? by ps4fanboy on Wednesday April 06, 2016 @06:40PM (#11442850)
By cheap I meant not having to dig a tunnel, by using lead, which I think is the cheapest dense metal?, you avoid having to have a very long tether, say compared to water/concrete.
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