Comparing two systems, one with everyone using mass transit plus scooters of various types, the other, everyone owning an auto, I suspect the former would have

Comparing two systems, one with everyone using mass transit plus scooters of various types, the other, everyone owning an auto, I suspect the former would have a lower emissions footprint. A lot lower. Scooters may be worse than walking, but they could be a step in the direction of a pollution-free future.