Sure... CO2 capture => Fischer-Tropsch => wax => fatty acid => food. The CO2 capture part is new, and presumably one would use solar now, but the rest was attem

Sure... CO2 capture => Fischer-Tropsch => wax => fatty acid => food. The CO2 capture part is new, and presumably one would use solar now, but the rest was attempted during WW2. E-fuel plants do this for synthetic aviation fuel. You can also do it slightly more indirectly via acetate: https://www.nature.com/articles/s43016-022-00530-x.pdf https://www.nature.com/articles/s43016-022-00530-x.pdf