> Firstly Proof of Work is incredibly energy inefficient, to extent that electricity consumed to append to public blockchains is comparable to electricity used

> Firstly Proof of Work is incredibly energy inefficient, to extent that electricity consumed to append to public blockchains is comparable to electricity used by nation states. Proof-of-work is designed to be inefficient -- to consume exactly as much power as the bitcoins produced from it are worth. The more efficient PoW is, the less energy it requires to rewrite history, which is exactly what we're trying to avoid.