Ethereum’s Merge has a ‘successful’ final dress rehearsal for its climate-friendly upgrade

Ethereum, the second-biggest cryptocurrency by market value, just passed its final test before it pushes ahead with its Merge upgrade that it says will make it greener and therefore make it more competitive with Bitcoin. Ethereum was created almost a decade ago and has been mined through a proof-of-work mechanism. The system works like a competitive numeric guessing game and the first person to solve the puzzle is awarded a fixed amount of cryptocurrency. But it requires a global network of computers to run at the same time when a transaction takes place and therefore more energy. The cryptocu…