> Scooters emit less CO2 per distance traveled than cars (and obviously much less than bike riders!) I don't have time to dig up the numbers right now, but I t

> Scooters emit less CO2 per distance traveled than cars (and obviously much less than bike riders!) I don't have time to dig up the numbers right now, but I think your "obvious" claim is probably quite badly mistaken. The faster you go, the more energy required per mile, because the power required to overcome air resistance is cubic in velocity. Muscles also have higher thermodynamic efficiency than a gas motor.