Ethereum Closes in on Long-Sought Fix to Cut Energy Use Over 99 Percent

Ethereum and better-known-rival Bitcoin both operate using a proof-of-work system that requires a global network of computers running around the clock. Users and developers of the world’s most-used blockchain have been wrangling with its carbon-footprint problem for as long as it’s been around. Now, they say, several recent breakthroughs will finally enable them t...

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