The US Department of Energy has committed nearly $3 billion to enhance sustainable aviation fuel (SAF) production, aiming to increase output to 3 billion gallons per year by 2030. Two companies, Montana Renewables and Gevo, are set to receive loan guarantees to expand biofuel facilities, with the potential to significantly boost SAF supply. While SAF is not entirely carbon-free, it is viewed as a key solution for reducing aviation emissions, with the ability to cut lifecycle carbon emissions by 50-80% compared to conventional jet fuel.