Synthetic Biofuels and biodiesels made from Algae that captures co2 seems to hold more promises that can easily be converted into existing ICE vehicles today if we are willingly to pour huge investment and commercialize it on a larger scale. Heck, even Mesquite Trees or Switchgrass is another great sustainable source to make biofuels. As with Hydrogen combustion engine that Toyota tested on the hatchback Corolla during the 2021 Super Taikyu Race. I like how car companies like Toyota or Porsche investing on synthetic e-fuel is taking a more diverse approach in achieving carbon neturality without going all out electric as a singular solution like most automakers do.,(reply>), @el Looto Biofuels made out of Algae seems to be the best approach. And as much as I love E85 aka. Race-corn fuel, sadly you're right that it takes up away the food supply thus raising the prices. But, biofuels that comes from juniper and mesquite tree that can be grown in drylands would be another good alternative.,(reply>), Biofuels would have to come from some form of algae. Land based biofuels compete directly for cropland (ie more biofuel means less food means higher food prices).