This is slightly off topic, more a Public Service Announcement ... but it is something we have discussed mostly in the context of receiving payment and paying developers.
Etherium switched a while ago from the 'proof of effort' to the 'proof of stake' model of mining. Their energy consumption has therefore plummeted. I don't know how much their blockchain accounts for or if this is already included. A blockchain is by definition using redundant copies on redundant hardware, so it is inherently wasteful looking purely at the question of energy consumption.
https://www.statista.com/statistics/1265897/worldwide-ethereum-energy-consumption/
Etherium
Bitcoin
So please, if you're using cryptocurrency, consider switching to etherium or some other 'proof of stake' based crypto.
"[What is "proof of work" or "proof of stake"?](https://www.coinbase.com/learn/crypto-basics/what-is-proof-of-work-or-proof-of-stake "What is "proof of work" or "proof of stake"?")"
