Flying has become a matter of course for many people. Air transport of people and goods is expected to double or even triple again in the coming decades. In spite of all “flying shame”. Due to population and economic growth, the markets of the future are in India, China and Africa. Alternative forms of propulsion such as hydrogen still need many years to arrive in commercial flight operations. For medium- and long-haul flights, no feasible alternative to liquid fuels is yet in sight. Moreover, aircraft have a lifespan of several decades, much longer than cars. So the existing and growing fleet of aircraft will be in operation for many years to come. All this leads to only one conclusion: if air transport is to move towards Net Zero, there is no way around Sustainable Aviation Fuels (SAF). The current supply is marginal – the future demand all the greater.