The only major blockchains using proof of work and having considerable environmental impact at this point are Bitcoin and Ethereum. Bitcoin has stalled in deve

The only major blockchains using proof of work and having considerable environmental impact at this point are Bitcoin and Ethereum. Bitcoin has stalled in development so I don’t think it will ever change, Ethereum has been talking about moving to extremely low energy Proof of Stake for years (hopefully will happen soon). Almost all the other major blockchains available - Polkadot, algorand, Tezos, NEAR, Solana, Cardano - are proof of stake, or similar extremely low energy consumption blockchains. The environmental criticism of blockchain is therefore going the way of the dodo. There are many valid criticisms of blockchain but the energy consumption criticism is about to be technologically outdated. It will age like milk. The only significant project using it is really Ethereum, and like I said, they have long promised to move on but have apparently gotten into a lot of technical trouble doing it, but they are still dead set on doing it.