How Many Emissions Could Sustainable Fuels Theoretically Save?

As the aviation industry looks to reduce emissions, sustainable aviation fuel (SAF) is one of the keys to reaching targets. The aviation industry is working on a huge range of levers to reduce emissions, including more efficient aircraft, various smart systems, and even weather forecasts to avoid aircraft contrails (which are thought to contribute to global warming). In the future, it is hoped electric and hydrogen aircraft will be able to be introduced on many routes. But for now, SAF is seen as key. But how much could SAF help the industry?