It's "funny" with the whole EV move.<br>Combustion engine is not a issue, fuel is. This is why from almost decade we know how to mass synthesize Petrol, Diesel and recently even jet fuel, from CO2 and H2.<br>More ironic is when You look onto need of rebuild energy and charging infrastructure, energy conversion losses,   and whole fact, that charging EV from grid that is more dirty than 450g CO2 per kW is more environment harmful than modern combustion car.<br><br>If we focus on fuel synthesis in half way as we did on EV move, we probably would not even need to have this topic.,(reply>), Fuel synthese is a costly complicated process with a huge footprint. Just one simple question: You know how H2 is produced? The bulk of it comes from natural gas and releases CO in the proces wich is burned to CO2 with NOx as byproduct. Every single H has to release at least 4 C's.<br><br>I realy never got it that bio-diesel always had been favoured over straight plant oil. Many engines can burn it without significant modifications. Seems the solution always has to be more complicated than the problem...