The car has an HEPA filter which removes dust from the air which is nice but that's not the whole story, as can be expected from marketing. 6.3kg of hydrogen c

The car has an HEPA filter which removes dust from the air which is nice but that's not the whole story, as can be expected from marketing. 6.3kg of hydrogen consumed means 50 kg of atmospheric oxygen consumed, which is 170 000 liters of air. So it purified 450 000 liters but it also removed oxygen from that same air, around 38% of it. I would not breathe that exhaust air, it may not be CO2 rich, but it sure is oxygen depleted.