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.

[Good Magazine]

Send an email to Ray Wert, the author of this post, at ray@jalopnik.com.