Ever wondered whether walking was more resource efficient than driving? Although we know we poop more when we exercise, this chart finally helps us to answer that question a bit more scientifically.

It turns out the human body is an extraordinarily efficient machine — much more so than even the most efficient car. Which gets us to wondering — shouldn't we be running our cars on people or Soylent Green?

While we ponder that question — take a look at the full chart here.

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[Good Magazine]