Alternative Fuels2050 Decarbonization Meeting US Carbon Neutral Goals of Net Zero by 2050 requires significant changes in both commercial and general aviation, Carbon Emissions Aviation accounts for 2-3% of global carbon dioxide emissions. SAF Alternate aviation fuels, using similar chemical compositions as fossil fuels, hold the greatest promise for meeting 2050 goals. Bio v. Electro Fuels Fuels derived from biological sources or elements like carbon and hydrogen. Issues: Expensive, time-consuming and hard-to-scale. Working on a Green Alternative?