Around 4 million trees are required to offset the nearly 240 million kilograms of carbon dioxide produced by the CryptoKitties non-fungible token (NFT) collection, according to research by NFT Club, an NFT education company. 

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Fast facts

  • Sorare, Axie Infinity, Art Blocks and The Sandbox were also among the top five NFT collections with the highest carbon emissions. 
  • In what the report hails as a success story, Axie Infinity migrated to the Ronin blockchain last year which significantly reduced its carbon emission — it saved nearly 25 million trees that would have been required to offset the carbon emitted from transactions on Ethereum. 
  • Just the process of minting an NFT, which is adding it to the blockchain, produces 83kg of carbon, before any transfer and primary or secondary sale, the research showed. 
  • It takes 1.37 trees to absorb the carbon emission from one NFT sale — an average acre of forest is required to absorb the carbon produced by 1,764 NFT transactions. 
  • Snoop Dogg, an NFT whale with a portfolio of 3,683 NFTs, would need to plant 5,050 trees, to negate the carbon emitted by his collection, the research claims.  

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