We use gas from fracking = where we pass steam through sand will dead animals and plant in. This gives us non-fossil natural gas – scientists call it reforming.
We buy biodiesel, and pass the hot fuel oil down 4 titanium honeycomb catalysts, we pump natural gas up. We get bio petrol.
1 C12H26+4CH4->C16H C16 is petrol, C12 diesel
So as we burn the petrol, we get back the CO2 the plants took in last gring season – to make biodiesel.
Diesel engines produce less CO2, and the same NO and NO2 (NOx) as petrol engines. NOx is natural plant fertilizer – so not a pollutant. The major source of NOx, are lightening strikes, and wood fires.
The NOx from car engines just boosts plant growth in the town or city. Diesels – the greenest engine on Earth.