More than 100 airlines have started using sustainable aviation fuels (SAFs). But can the new fuels be scaled fast and cheap enough to meet future demand? Keystone / Silva Schnurrenberger A Swiss start-up aims to produce clean jet fuel from renewable methanol. But while the promising technology is attracting airlines, investors and policymakers, a critical challenge remains: can sustainable aviation fuels be scaled fast and cheap enough to decarbonise global air travel? Listen to the article Listening the article Toggle language selector English (US) English (British) Generated with artificial intelligence. This content was published on October 5, 2026 – 09:00…