>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.

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.

Non-electric cars will be banned in most inner cities probably within the decade because of their pollution, sort of a parallel with how horses were banned earlier.

Horses were banned? Here you just need a horse-drawn carriage license, but good luck getting one.

It was already addressed in other content that they're not banned everywhere, but additionally, the poop you mention is not a big problem. In many places horses in the cities are forced to wear horse-size napies which catch the poop.

Yes. But cars produce unwanted mess in atmosphere that in almost impossible to clean..

Horses were never banned (except maybe locally), they're just far more expensive and difficult to run than cars.

Depending on local regulations, you may of course be fined if you don't clean up your horse's mess.

Horse poop degrades fairly rapidly (relative to omnivore and carnivore excrement). Doesn't smell as bad either.

Cars produce all sorts of chemical compounds that ruin the air we breath.

No. It doesn't degrade rapidly. It stays there for weeks unless there's rain. It does smell bad. Hitting a fresh one is a cyclists worst nightmare.

I'm not saying cars are innocent here, but at least they don't poop.