Most fuel for aviation is jet fuel, and there already is a "drop in" approved biofuel available: https://www.faa.gov/about/office_org/headquarters_offices/ang/

Most fuel for aviation is jet fuel, and there already is a "drop in" approved biofuel available: https://www.faa.gov/about/office_org/headquarters_offices/ang/redac/media/environment/2021/march/envandenergy_mar2021_SAFUpdate.pdf https://www.faa.gov/about/office_org/headquarters_offices/an...