I found it interesting also to look at kwh per transaction. Several places claim that in early 2020 bitcoin used ~700kwh per transaction (https://www.statista.c

I found it interesting also to look at kwh per transaction. Several places claim that in early 2020 bitcoin used ~700kwh per transaction (https://www.statista.com/statistics/881541/bitcoin-energy-consumption-transaction-comparison-visa/ https://www.statista.com/statistics/881541/bitcoin-energy-co...), and this equates to about 2700 miles of driving a Tesla Model 3 at the rated consumption of 257wh/mi which is plain a ton (and also is about 1 month of solar production from my house's rooftop solar). With Tesla now accepting bitcoin, this means you can add ~2.7k miles of emissions to the car without even driving it, and probably even more since they have to move the money afterwards. Edit: Don't forget about ewaste also. Some quick math and assuming a 2 year lifetime says that each miner can contribute 10-20 transactions. This is why I think proof of stake is a better way to go.