Brazil's largest energy giant tests Cardano to fix carbon double-counting

According to CryptoSlate, Brazil's state-controlled energy company Petrobras is testing Cardano in an ongoing research and development collaboration to track sustainable aviation fuel (SAF) benefits and prevent double-counting. The initiative, developed alongside PUC-Rio University's Ledger Labs and the Cardano Foundation, utilizes standardized CS-SAF tokens on the Cardano network.

The Book-and-Claim model allows airlines, companies, or passengers to receive environmental benefits even when SAF is produced or used elsewhere. Tokens can be created, transferred, checked, and retired, with the retirement process preventing claims from being reused. The digital record traces allocations back to original fuel certificates, carrying metadata aligned with the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA).

Additionally, a Diesel R project developed with PUC-Rio proposes supply-chain checkpoints across production, transportation, and use to create a continuous fuel-lifecycle record supporting Scope 3 emissions reporting. CryptoSlate reported that commercial usage remains unquantified as disclosures provide no transaction volumes or revenue figures.