I haven't studied it, but the general compaint seems to be it takes a fair amount of power to run the computers to generate coins, validate transactions. (enoug

I haven't studied it, but the general compaint seems to be it takes a fair amount of power to run the computers to generate coins, validate transactions. (enough to power over 1,000,000 american homes, by some accounts[1]) China has some of there mines near hydropower (the cheapest power source). [1] https://blockgeeks.com/bitcoins-energy-consumption/ https://blockgeeks.com/bitcoins-energy-consumption/ https://motherboard.vice.com/en_us/article/qkvxk3/chinas-biggest-secret-bitcoin-mine https://motherboard.vice.com/en_us/article/qkvxk3/chinas-big... https://qz.com/1026605/photos-chinas-bitcoin-mines-and-miners/ https://qz.com/1026605/photos-chinas-bitcoin-mines-and-miner...