The European Business Aviation Association (EBAA) emphasizes the importance of a clear plan for adopting sustainable aviation fuel (SAF) through a book-and-claim process to accelerate sustainability in the industry. Catalysys proposes ammonia as a fuel source for airports and aircraft power, highlighting the efficiency of on-site production. In the UK, the Civil Aviation Authority launches the Hydrogen Challenge for air transport, while NASA's Glenn Research Center in the U.S. issues a request for information on a cryogenic hydrogen test facility for aeronautics. Additionally, French partners conduct ground tests on a liquid hydrogen turbine engine, showcasing advancements in hydrogen propulsion for general aviation. These initiatives aim to drive the use of renewable sources such as SAF and hydrogen in the aviation sector, promoting more sustainable practices and cleaner air travel.