You've raised some interesting points. If motor vehicles were banned worldwide, it would definitely bring about a big change in how people travel. It would require everyone to adjust their jobs and lifestyles to adapt to this new reality.

In terms of traffic and pollution, a ban on motor vehicles could lead to less congestion and more space for cyclists and pedestrians. People might have to find alternative solutions for transportation, like using animals such as donkeys, horses, or oxen. However, this change might not be easy for everyone since we're used to the speed and convenience that motor vehicles provide.

It's important to consider that relying solely on animals for transportation may not be ideal for emergency services like fire trucks and ambulances. They heavily rely on motor vehicles to carry out their services effectively. Without motor vehicles, their ability to respond quickly in emergencies could be compromised.