Instead of Ethereum, other blockchains are used. This can be up to hundreds of times better for the environment in terms of carbon footprint. Some of these chains include Algorand, Tezos, Polkadot and other PoS networks.
Not at all, unless the network has a global bottleneck like a miner. Networks built on global blockchains are the problem. And if they use proof of work that’s even worse!
Using other blockchains:
Instead of Ethereum, other blockchains are used. This can be up to hundreds of times better for the environment in terms of carbon footprint. Some of these chains include Algorand, Tezos, Polkadot and other PoS networks.