3 ms·

How about horses? Tried and true method, reliable for millenia, green and sometimes majestic.

• mnw21cam 11y ago
  If everyone had a horse these days, the environmental impact would be massive, from the infrastructure required to generate the food for them (there probably isn't enough land area in the world to grow enough grass), and the amount of methane they emit.
  • return0 11y ago
    We do the same with cows and other animals we eat. Plus we feed billions of pets (for which we have no use). Someone will have to do the numbers, but it's possible that, at a small density, they're a green alternative for short distances. Plus it's easy to share them.
    • smacktoward 11y ago
      Even in the late 19th century, cities like London and New York had major problems dealing with the massive volume of dung that horses were leaving on the streets. The population of New York City was 1.5 million people in 1890. It's 8.1 million today.