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Deep Abandoned Mine In Finland To Be Turned Into A Giant Gravity Battery

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2 minutes ago, Alan Ambrose said:

megawatts of energy.

Mega watt hour.


They claim that they don't need any rare earth metals. 

Indium is a by product of copper mining, so maybe they can use some of the excess energy to process the spoil.


Rare earth metals are not scarce, they just tend to be in places then Western world wish they were not.


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