The aviation sector is booming, with the number of flights in 2023 expected to outstrip the industry’s 2019 peak. Commercial aviation is already responsible for 2-3% of global carbon emissions. With the renewed surge in air travel, those emissions are only likely to increase in coming years.

Current efforts to reduce aviation carbon emissions focus on the production of sustainable aviation fuels (SAFs), which include both liquid biofuels (made from algae, food crops and food waste) and synthetic options (such as green hydrogen or synthetic kerosene).