Sustainable aviation fuel — an alternative to conventional petroleum — aims to decarbonize a carbon-heavy sector. Right now, it accounts for less than 1% of global jet fuel. Biden’s Inflation Reduction Act incentivizes aviation’s transition to SAF, but manufacturers still face big roadblocks. Plus, not all SAFs are created equal. This episode is part of our series “Breaking Ground,” where we look at how federal infrastructure spending might change the economy.