MOL Group and Slovnaft have achieved successful HVO (Hydrotreated Vegetable Oil) and SAF (Sustainable Aviation Fuel) production tests, marking a significant step in the energy transition towards more sustainable aviation fuel alternatives. Moreover, FuelSAFII has been established to bring together stakeholders in the aviation industry to share technical knowledge and foster collaboration. In Europe, the EBAA (European Business Aviation Association) advocates for a clear plan for SAF book-and-claim to streamline the accounting process and promote the faster adoption of sustainable aviation fuel. The UK has expanded its efforts in launching hydrogen-powered air transport, as evidenced by the Civil Aviation Authority's Hydrogen Challenge. NASA is also making strides in hydrogen aviation, proposing a Cryogenic Hydrogen Test Facility for Aeronautics to further research in this area. Additionally, Catalsys and French partners are testing general aviation liquid hydrogen turbine engines, showing promising developments in hydrogen propulsion technology. Despite some doubts surrounding the U.S. Treasury's SAF production tax rules, these initiatives collectively reflect a positive outlook on the advancement of sustainable aviation fuel production and the exploration of hydrogen as a potential fuel source for the aviation industry.