The Biden Administration last week announced an effort to lower carbon emissions in aviation, targeting a 20 percent drop in aviation emissions by 2030 and the “potential for a fully zero-carbon aviation sector by 2050.” That would be 3 billion gallons annual use by 2030, and potentially 35 billion gallons per year by 2050.   Those are ambitious goals, to say the least. The 2030 target for aviation fuels would be a 15 percent expansion of the 2020 (most recent) total RFS biofuel volume, and 60 percent of the “advanced” biofuel volumes (which is the category aviation fuel would fall under).  However, not all of the “sustainable aviation fuel” (SAF) would come from crop feedstocks, accordin...