On October 20th, the latest "Cambridge Digital Mining Industry Report 2025" shows that Bitcoin's current annual electricity consumption is estimated at 138TWh, generating about 39.8Mt of carbon dioxide equivalent emissions. The report states that 52.4% of Bitcoin mining energy currently comes from sustainable sources such as renewable energy and nuclear power. In contrast, Ethereum, after completing the "merger" upgrade in September 2022, has moved from proof of work (PoW) to proof of stake (PoS...