Ethereum upgrade prepares the blockchain for big energy-saving change next year, founder says

Mining rigs for the Ethereum and Zilliqa cryptocurrencies at the Evobits crypto farm in Cluj-Napoca, Romania, on January 22, 2020. Ethereum, the world’s most widely used blockchain, is undergoing a major shift to proof-of-work mining that could lead to a 99 per cent reduction in energy use. Photo: Bloomberg