It's amusing to contemplate whether it would actually be feasible to have a decent sized modern town in which horses, rather than cars, are the main form of tra

It's amusing to contemplate whether it would actually be feasible to have a decent sized modern town in which horses, rather than cars, are the main form of transport. The big problems becomes dealing with the huge amount of horse waste, both manure and urine, but mostly manure. A horse will create about 15kg of manure and 5kg of urine each day. For a small city of say 200,000 people, you'd need say 100,000 horses. That means 2000 tons of additional waste each day (the humans will be generating about 200 tons of biowaste a day). This sort of problem was faced in the late 1800's. Some predicted the end of urban civilization caused by horse manure (https://en.wikipedia.org/wiki/Great_Horse_Manure_Crisis_of_1894 https://en.wikipedia.org/wiki/Great_Horse_Manure_Crisis_of_1...). Automobiles saved us all from the horrible fate of being buried in horse poop.