Since you couldn't realistically replace all ICE vehicles right away, it'd help ease the transition and especially in rural areas, air quality might not be a bi

Since you couldn't realistically replace all ICE vehicles right away, it'd help ease the transition and especially in rural areas, air quality might not be a big concern anyway. If you end up with a surplus of clean gas, you could just burn it in dedicated plants and take care of the NOx there, or use it for aviation and in agriculture.