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The Ethereum community started talking about this five years ago, which spawned a multi-year effort to move to "Proof of Stake" and stop using large amounts of electricity forever.

The first phase of this effort launches later this year. It's currently undergoing a public testnet. https://medalla.launchpad.ethereum.org/

Since 99% of blockchain app activity occurs within the Ethereum ecosystem, and Ethereum is dropping proof of work, we should put to bed the idea that crypto industry insiders don't care about this issue or aren't doing anything to solve it.