SAF

https://climatecatalyst.org/learning-hub/sustainable-aviation-fuel-policy-in-the-eu/

Sustainable aviation fuel policy in the European Union

The mandate requires two per cent of the fuel made available at EU airports to be SAF by 2025, rising to six per cent in 2030, 20 per cent in 2035 and gradually up to 70 per cent in 2050. Within the mandate, the proportion of synthetic fuels as a sub-mandate to those targets grows in significance and it will need to make up a larger part of the fuel mix over time