Sustainable aviation fuel \u2014 an alternative to conventional petroleum \u2014 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 \u201cBreaking Ground,\u201d where we look at how federal infrastructure spending might change the economy.