Is there no alternative to jet fuel?
Is there no alternative to jet fuel? Today, most commercially available alternative jet fuels are made from fats, oils, and greases. If they're derived from waste sources like used cooking oils, these fuels reduce carbon dioxide emissions by roughly 70% to 80% compared with fossil fuels.
How realistic is sustainable aviation fuel?
Second, SAF are misnamed, as there is no evidence that enough fuel can be sustainably produced in the quantities needed. Indeed, a recent report by the Royal Society in the United Kingdom adds to the evidence that it will not be possible to produce enough SAF to meet aviation demand.