>>43827643>That kind of fuel would be terribly inefficient though.Not necessarily, biochemistry gets pretty deep. There are bacteria that can produce biodiesel that is pretty close in performance with the usual stuff, and it's a recent tech. There's also bioengineered bacteria that can produce cyclopropane hydrocarbons comparable to actual rocket fuel.
https://www.cell.com/joule/fulltext/S2542-4351(22)00238-0?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS2542435122002380%3Fshowall%3DtrueLife finds a way!