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Over 2 percent of the US’s electricity generation now goes to bitcoin
(arstechnica.com)
This is a most excellent place for technology news and articles.
Mining is barely transactional in nature. Pretty much all of it is calculating hashes, which, on one hand, is super important as part of Proof-of-Work consensus, the most decentralized one we have, but on the other we have other reasonably secure options that waste two orders of magnitude less power.