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I’m just impressed by what an outlier horses are in that graph. Despite being terrestrial walkers, they’re more efficient than nearly all birds.
As long as someone laid down pavement
Even a dry trail is pretty efficient on a bike
*As long as someone laid down pavement or keeps the trails maintained
Still by far the least amount of necessary infrastructure needed for any means of transit except walking.
Mountain and gravel bikes beg to differ
Gravel roads aren’t bad if you have thick and knobby tires.
And keep an eye out for really big chunks of gravel. And ruts. And puddles. And erosion. But other than that! It’s fine.
