[antris]

>I thought horses was banned because they ... produce some unwanted mass on the road which hard to clean? > >Cars on the other hand, don't do that at all.

Cars do it, but instead of it being a hard to clean mass, it's a nearly-impossible-to-clean toxic gas that kills thousands of people every year.

[nickrio]

I actually agree with what you said.

What I mean is that the "nearly-impossible-to-clean toxic gas" is also "nearly-impossible-to-see" when in the air.

See, that's why they're not banned, because people "Don't see" the problem.

If cars needs to take a sold mass smelly hot dump every few miles too, they were long banned.