Ethereum's annual electricity consumption has fallen to approximately 7.87 gigawatt-hours, a reduction of more than 99.9% compared to before the Proof-of-Stake transition, according to a report from the Cambridge Centre for Alternative Finance. The current continuous power demand is estimated at around 0.90 megawatts, a significant drop from roughly 2.4 gigawatts before the Merge. Meanwhile, about 62% of Ethereum full nodes are concentrated in just four countries: the United States, Germany, Finland, and France, meaning the network's remaining environmental impact now depends on the electricity grids and generation mix in the regions where nodes are located. The report estimates that 56.4% of the electricity used to run Ethereum comes from sustainable energy sources, and that annual greenhouse gas emissions have fallen to approximately 2.37 kilotonnes of carbon dioxide equivalent.