The US Department of Energy has recently announced a $3 billion investment to significantly boost the country's output of sustainable aviation fuel (SAF), with a focus on reducing carbon emissions from air travel. Sustainable aviation fuel is seen as a crucial step towards achieving decarbonization goals in the aviation sector. The initiative aims to address the limited supply of SAF, which currently accounts for only about 1% of all jet fuel used globally. Montana Renewables and Gevo, two companies specializing in biofuel production, are set to benefit from the investment. Montana Renewables, a subsidiary of Calumet, could receive up to $1.44 billion to expand its renewable fuels facility in Montana, significantly increasing its SAF production capacity. Gevo, based in Colorado, is in line for a $1.46 billion loan guarantee to build a new sustainable aviation fuel refinery in South Dakota. The Biden administration has set ambitious targets for SAF production, aiming to reach 3 billion gallons per year by 2030. This aligns with the administration's broader efforts to promote a bio-economy and reduce harmful emissions nationwide. The announcement of new tax credit guidelines under the Inflation Reduction Act further supports the growth of sustainable aviation fuel production by incentivizing companies to adopt low-carbon practices. While there are challenges ahead, such as ensuring a sufficient supply of renewable natural gas and addressing concerns about the overall impact of biofuels on emissions, the investment signals a positive shift towards greener aviation practices. Gevo's Net-Zero 1 project, scheduled to begin construction in 2025, aims to significantly reduce carbon emissions compared to conventional jet fuel, indicating a promising future for sustainable aviation fuel in the US.