Bitcoin and Ethereum Use the Same Amount of Electricity as the Country of Austria

A staggering amount of energy is used to power Bitcoin and Ethereum, the two largest blockchains. The energy required for a single transaction on Bitcoin is the equivalent of powering a two person household for three months.

Source

See also:

  • This comment which picks apart the argument that cost of transactions are the same as the banking industry if you factor in non-server costs
  • Web3