Before the Merge upgrade, in 2022, the energy consumption of Ethereum ranged between 46.31 terawatt hour (TWh) per year to 93.98 TWh per year.
The Merge, which is considered one of the most significant blockchain upgrades on Ethereum to date, brought down the network’s energy consumption by 99.9% immediately.
On Sept. 15, the Ethereum blockchain migrated from proof-of-work (PoW) to a proof-of-stake (PoS) consensus mechanism in an effort to transition into a green blockchain. What followed was an immediate and steep drop in total energy consumption of the Ethereum network.
Source : cointelegraph.com/news/the-merge-brings-down-ethereum-s-network-power-consumption-by-over-99-9 by Cointelegraph By Arijit Sarkar - October 29, 2022
