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Yes, a lot of mining is concentrated in countries that the US would rather not have control the production of emerging asset classes. As a result you are starting to see incentives to onshore mining with places like Texas with a supply of cheap wind and grid balancing issues encouraging miners to move. Same in Canada and Scandanvia.
greentricky
Isn't the incentive to use green energy pretty huge? Green, renewable or 'free' energy significantly lowers cost of production.
Anyway, I still think PoW needs to go. Proof of stake definitely seems the way forward. That's one of the reasons I'm a fan of the Cardano project, currently. They recently signed a deal with the government of Ethiopia to track student performance on the blockchain.