> Those can run on methanol or synthetic fuels. And how are these synthfuels made? They all (except of biofuel, which as I said is ethically questionable) requ

> Those can run on methanol or synthetic fuels. And how are these synthfuels made? They all (except of biofuel, which as I said is ethically questionable) require hydrogen as precursor, and that's my point. It's all carbohydrates, which means you need hydrogen and oxygen (these you can get from water electrolysis) and carbon (these you can get from e.g. CO2 sequestration).