5 points
Sure, but despite all the crypto bros assurances to the contrary, the only real-world applications for it is buying drugs, paying ransoms and getting scammed. Which means that any non-zero amount of energy is too much energy.
There are some use cases below, and none use proof of work.
https://hbr.org/2022/01/how-walmart-canada-uses-blockchain-to-solve-supply-chain-challenges