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A CI certificate is simply a transferrable claim of origin backed up by data. The NFT(s) provide a methane performance certificates for the output fuel tokens, helping producers with lower carbon intensity to obtain greater value for their products. It is similar to a Renewable Energy Certificate (REC), but whereas a REC attests that electricity produced is from a renewable source, the CI certificate attests the total emissions of the fuel produced. The consumer can reduce is fuel CI by purchasing carbon tokens from a low methane emission supplier. It Emission profile certificates tied to carbon tokens could be transferred between two users of fuel so that a user which is looking to reduce its emissions footprint could pay for a lower carbon fuel, without physically taking delivery of it. This would require simultaneously transferring, with the aid of a smart contract, fuel tokens between the certificate sender and receiver.
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