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Some are working on a consensus system called proof of stake which does not use energy. It is not clear whether it will be fully secure, etc., but if you read a
by Andrew_Quentin 10y ago
Some are working on a consensus system called proof of stake which does not use energy. It is not clear whether it will be fully secure, etc., but if you read about this stuff decades ago you might want to google and research primarily Bitcoin and Ethereum.