"The Ethereum Merge is a network update to transition Ethereum from Proof-of-Work (PoW) to Proof-of-Stake (PoS) consensus mechanism."
Proof-of-Work (PoW)->>>>> Required Mining Hardware to validate transaction
Proof-of-Stake (PoS)>>>>> Not required
Meaning you do not required mining hardware any longer ... Do not required high Energy consumption to run ETH..