The Merge, which is considered one of the most significant blockchain upgrades on Ethereum (ETH) 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.
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 lowest energy consumption for Ethereum was recorded on Dec. 26, 2019, at 4.75 TWh per year.
Starting from Oct. 15, the day of the Ethereum Merge, Ethereum’s energy dropped down by over 99.9% and continues to maintain low energy usage. As a result, the network’s carbon footprint currently stands at 0.1 million tonnes of CO2 (MtCO2) per year.
When translated to single Ethereum transactions, the electrical consumption is as low as 0.03 kilowatt hour (kWh) and the carbon footprint stands at 0.01 kgCO2, which according to digiconomist, is equivalent to the energy used when watching two hours of YouTube.
Despite the celebrations around Ethereum’s transition to PoS, community members raised concerns related to the blockchain’s centralization and higher regulatory scrutiny.
The centralization aspect became evident right after the Merge, as 46.15% of the nodes for storing data, processing transactions and adding new blockchain blocks could be attributed to just two addresses.
While Ethereum proponents claim that anyone with 32 ETH can become a validator, it is important to note that 32 ETH, or around $41,416, is not a small amount for a newbie or common trader.
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