Ethereum's switch from Proof-of-Work to Proof-of-Stake cut its annual electricity use by over 99.9%, down to 7.87 GWh. That is less than half the power consumed by the British Museum. The network's carbon emissions now sit at 2.37 kilotonnes of CO2 equivalent per year, roughly the same as 900 UK households. About 56.4% of the electricity Ethereum uses comes from sustainable sources, according to the article. Future upgrades like Lean Ethereum aim to push efficiency further while keeping the network decentralized. This is a concrete example of how a protocol change can slash energy demand and emissions without losing functionality. For anyone tracking the carbon footprint of digital infrastructure, the Ethereum Merge shows that software architecture decisions can have outsized climate impact. The numbers here are specific and verifiable, which makes this more than just a headline. It is a case study in how to decarbonize a major digital platform through design rather than offsets.
