Results from flight testing the use of 100% blends of sustainable aviation fuel (SAF) in commercial aircraft have shown a reduction in the amount of soot and contrails they emit compared to conventional Jet A-1 fuel.

The Emission and Climate Impact of Alternative Fuels (ECLIF3) study measured the emissions from 100% biofuel blends, also called sustainable aviation fuel , from both engines of an Airbus A350 powered by Rolls-Royce Trent XWB engines.

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