Because Ethereum is proof-of-stake, it will use less energy
Ethereum, the second-largest cryptocurrency, has converted to proof-of-stake, which has reduced its energy requirements. The move, which has been in the works since 2016, will have little impact on the typical Ethereum user, but it will put miners out of work.
The Bellatrix upgrade was enabled on September 6th, kicking off the transition. It is now finished after the extraction of the Terminal Total Difficulty block, which triggered the Paris upgrade. The technical component is complete; now we can wait and see what happens.