Put a bun bag on ‘em.
I can’t see this making sense in large cities, but some small farmers and loggers find them a cheaper alternative to paying the fuel costs for tractors and skidders.
Actually, it would work just fine for me - I am 4 miles from my office.
I would love it.
Unfortunately, in our grand free country, owing a horse in my town has been illegal since I was a kid.
They built a metro stop where our barn used to be.
Small problem: You can't park a horse in the machine shed for the winter, after filling it with anti-freeze & draining the fuel tank.
You have to feed, water, and shovel every day, whether you're using it or not.
Which brings up the next problem: growing enough additional 'fuel' to keep them fed & watered, without losing crop land, disturbing euro-sacrosanct 'habitat', or running afoul of other EUroproblems.
A horse (or cat, for that matter) = a nice, useful, furry friend; 12,000,000 = a plague of Biblical proportions.