Ethereum’s shift from the energy-intensive Proof-of-Work (PoW) consensus to Proof-of-Stake (PoS) has transformed its environmental footprint. Following the upgrade known as The Merge, the network’s annual electricity consumption plummeted to 7.87 GWh, less than half the energy used yearly by the British Museum. This represents a reduction of more than 99.9% from its prior continuous power draw of approximately 2.4 GW.
The network currently runs about 8,522 physical nodes, many supporting multiple validators that total nearly 894,000. The Cambridge Centre for Alternative Finance (CCAF) highlighted that while Ethereum’s infrastructure is spread across the globe, more than 60% of nodes are concentrated in a handful of countries, primarily the United States, Germany, Finland, and France. Despite this geographical concentration, the network maintains a high level of decentralization in its node distribution.
Another key environmental finding relates to the network’s energy sourcing: over 56% of the electricity used to power Ethereum comes from sustainable sources, including 17% nuclear and nearly 40% renewable energy. By contrast, natural gas remains the leading fossil fuel, accounting for about 28% of the network’s electricity mix. This cleaner energy reliance surpasses the global average sustainable energy share, emphasizing Ethereum’s reduced dependence on carbon-heavy grids.
The decrease in energy use has sharply lowered Ethereum’s carbon emissions. The network cut its annual CO₂ equivalent emissions by nearly 99.98%, now estimated at 2.37 kilotonnes—roughly equal to the yearly footprint of 900 UK households. These changes also coincide with Ethereum’s ongoing development, which aims to further improve efficiency and sustainability. Researchers recently revealed plans for “Lean Ethereum,” a multi-year initiative designed to overhaul the protocol gradually over several years, reducing energy and hardware demands without compromising decentralization or security.
Meanwhile, market indicators point to growing investor confidence, with Ethereum’s price recently rising above $1,790. However, reports suggest that surpassing the $1,800 level is crucial for sustained bullish momentum.