That’s not the issue. It is the hypocrisy of globalists who claim to support it burning fuel to travel—and shave a couple of hours off at that.
The jet set liberals are the loudest of the climate commies bunch.
But SAF made with lignin and other biomass via syngas is at least 80% net zero it actually wouldn’t be that hard to tune the gasification process to leave behind solid biochar which is 95+% pure carbon. Simply putting that into a old mine shaft or salt mine or landfill would turn the equation fully negative as you are removing carbon from the air in larger amounts than the burning of the SAF makes. Better use would be to plow that biochar into the fields used to grow the biomass it is the same thing as terra preta soil which holds more water, has higher yields, and needs less fertilizers while locking carbon into soil for thousands of years. There is 1000+ year old terra preta soil in the Amazon basin made by ingenious people so that proves the soil lasts and also is known for it’s high fertility.
The point is if they burn SAF they largely get to actually say it’s green, well greener you still have NOx ,and particulates in the stratospheric levels, but all jets do this and with 100,000+ flights per day a dozen Concorde flights per day is not even a rounding error.