Polkadot offers governance, staking, and bonding services to its users and holders. The carbon footprint associated with Polkadot is the lowest in comparison with other top proof-of-stake blockchains like Algorand, Cardano, Tezos, and Avalanhe among others.

source https://gadgets360.com/cryptocurrency/opinion/polkadot-dot-cryptocurrency-blockchain-2873023#rss-gadgets-all