What if your car produced horse manure for exhaust

So, try looking at things a little differently. We are all, at least partially, immune to the sensory effects of what our concentration of personal transportation systems does to the environment. We cannot see, until well after the fact, what our millions of automobiles are pumping into the atmosphere.

What if it were different?

What if, instead of cars, we all still rode horses? I'm not even going to dig around and come up with numbers. Just look outside and start counting. If every private automobile was replaced with a horse do you think we'd have a problem?

Given the exhaust from a horse, do you think we'd be able to manage the necessary daily clean-up?

How long would we continue to live with the physical damage to the environment that many horses would do?

We'd be up to our eyeballs in horse manure.

Here's a 1996 chart providing the number of automobiles in selected countries. It's grown since then.

If they were all horses, we'd be declaring a disaster.