https://www.pbs.org/video/new-york-horse-manure-crisis-ploay...
> New York City was a crowded mess: no one could figure out what to do with all the horse manure, urine, and rotting horse carcasses on the streets spreading disease. New York had over 100,000 horses producing over 2.5 million pounds of manure every day. Fossil fuel powered trains, electric streetcars and internal combustion vehicles were seen as the clean-energy alternative.
I doubt the rates would be as high now if we went back to horses, because a lot of injuries that would have been fatal around 1900 would be survivable today, but I bet a lot of people would be surprised by how high the rates would be.
Some articles:
https://www.bmj.com/rapid-response/2011/10/31/cars-and-horse...
https://legallysociable.com/2012/09/07/figures-more-deaths-p...
Though realistically, a lot more people walked. Not everybody could afford to feed or care for a horse.
Then someone told me the Porsches remain garaged at home until the weekend.
But yeah, the excrement does accumulate.
For the average horse rider perhaps but not the average person. Most people were never on a horse.
and in agricultural times in the US, I'd say most people were on horses.
But most people weren't riding them. A horse and cart is much more efficient.