The oil giant Petrobras, controlled by the Brazilian state, has chosen the Cardano blockchain to track the environmental attributes of sustainable aviation fuel and renewable diesel. This is not merely an experiment with technology, but an attempt to turn vague "green" claims into transparent assets that cannot be double-counted.
The company has developed two research applications. The first tokenizes the environmental attributes of sustainable aviation fuel (SAF) using the book-and-claim model: the benefit of emissions reduction is separated from the physical fuel and recorded in CS-SAF tokens. The metadata conforms to the CORSIA standard, and the token itself is "burned" after use to prevent the same savings from being counted twice. Passengers will be able to obtain a certificate linked to their flight through the app.
The second application creates digital checkpoints for renewable diesel Diesel R — from production to transportation and consumption. Both projects were implemented jointly with the Cardano Foundation and PUC-Rio university as part of a partnership that began with employee training in 2023. This is still the research stage, but even now it is clear how traditional energy is seeking a way to monetize sustainability.
For Petrobras, this is a way to strengthen its position in markets where buyers and regulators demand proof of a reduced carbon footprint. Double-counting of environmental benefits has long undermined trust in carbon credits and "green" certificates. Here, blockchain acts not as a speculative asset, but as an auditing tool that makes data immutable and available for verification.
Imagine a family budget where every expense on "eco-friendly" purchases is recorded in a shared ledger that no one can amend after the fact. That is precisely how Cardano helps Petrobras turn environmental attributes into verifiable financial instruments, reducing the risks of reputational losses and opening access to premium markets.
Investors in cryptocurrency and energy should take note: such projects show how blockchain is gradually integrating into the real economy, where value is created not only by price growth, but also by solving practical verification tasks.
