I suspect this whole thing is made up, because there is no such thing as a “biomethane engine.” “Biomethane” just means that the methane didn’t come from fossil fuels, but from the recent decay of organic material, e.g., plants, animal …
I suspect this whole thing is made up, because there is no such thing as a “biomethane engine.” “Biomethane” just means that the methane didn’t come from fossil fuels, but from the recent decay of organic material, e.g., plants, animal …