Obviously using food crops for fuel is a phenomenally stupid idea that could only be born of the rapacious corporate mind for profit before humanity.

An effective solution to the issue of using vegetable oils for diesel fuel is exemplified in this eye opening video on prolific algae farmed fuel oil production (though of course we’d like to see glass tubes or other materials in the place of the implicated seas of plastic here wouldn’t we)
(And remembering, that this is still fuel for the archaic combustion engine and remains an interim solution for an antique technology.)