> Another huge reason is that China outright banned the use of gasoline powered motorcycles in many big cities; since the majority of people just can't afford a car, the only replacement they could have is electric bikes.

Imagine how polluted the air in major Chinese cities would be if they didn't do this. For a counter example visit Karachi or Lahore and observe the air, both huge population centres that are full of small 2-stroke engined motorcycles and motor-rickshaws emitting blue grey exhaust everywhere.