Ethereum's Merge: A 99.9% Energy Revolution Silences ESG Critics

Cambridge's Centre for Alternative Finance shows that Ethereum's move to proof-of-stake using The Merge cut the network's power use by over 99.9 percent. The blockchain uses only 7.87 GWh every year, which is about 0.90 MW of continuous draw. This spectacular drop converts the network's gigawatt-scale power demands under proof-of-work to under one megawatt of continuous infrastructure load.

The study examined around 8,522 complete nodes and discovered a network-weighted average of about 105 watts per node. Nodes take care of most of the consumption; validators negotiate consensus with little energy. About 56.4 percent of the electricity generating these nodes comes from sustainable sources; hosting is centered in countries like the United States, Germany, Finland, and France and major suppliers including Hetzner, AWS, and OVH.

Long-standing ESG concerns about Ethereum's proof-of-work energy usage are effectively weakened by the change. The carbon intensity of the local grids where nodes run and the degree of hosting centralization currently define future emissions. The results point to Ethereum as a significantly more ecologically conscious network with an approximate 99.98 percent decrease in yearly greenhouse gas emissions to roughly 2.37 ktCO2e.