Ethereum’s been proof-of-stake rather than proof-of-work for couple of years now, so it’s no longer energy intensive.
There inherently can’t be a way to make proof of work lies wasteful as long as there are people who want to do the work. If you make hardware more, then it makes it cheaper to do the same amount of work, so people buy more hardware and do more work and more power gets used. If you make hardware less efficient, people just use the old hardware. You have to abandon proof of work altogether and switch it to something else that isn’t inherently tied to energy usage.
Ethereum’s been proof-of-stake rather than proof-of-work for couple of years now, so it’s no longer energy intensive.
There inherently can’t be a way to make proof of work lies wasteful as long as there are people who want to do the work. If you make hardware more, then it makes it cheaper to do the same amount of work, so people buy more hardware and do more work and more power gets used. If you make hardware less efficient, people just use the old hardware. You have to abandon proof of work altogether and switch it to something else that isn’t inherently tied to energy usage.