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How Did the Ethereum Network’s “Merge” Impact Its Energy Consumption?

The Ethereum network's "Merge" was the transition from the energy-intensive Proof-of-Work (PoW) consensus mechanism to the highly efficient Proof-of-Stake (PoS) mechanism. This change drastically reduced Ethereum's total energy consumption by approximately 99.95%.

This shift effectively eliminated the need for competitive mining hardware and the associated electricity costs, making Ethereum a "green" blockchain and addressing major environmental concerns.

What Are the Security Trade-Offs between PoW’S Energy Expenditure and PoS’s Capital-Locking?
How Does the Capital Efficiency of PoS Compare to the Energy Efficiency of PoW?
Compare the Capital Cost of a PoS Attack to the Energy Cost of a PoW Attack
How Does Proof of Stake (PoS) Reduce Energy Consumption Compared to PoW?