If you talk to Chuck Siegel, deputy director of animal management for the Dallas Zoo, he'll tell you that "poo and pee is our bread and butter."
Sounds a little gross, but it's totally true. Animal waste, rather than a useless byproduct, destined to take up space in a landfill somewhere, is instead going to be a source of energy for the zoo. Officials are implementing a plan that would take cardboard, tree limbs, and their never-ending supply of animal poop, and run it through a biogas generator that will help power several buildings.
With a total price tag of around $1 million, it's not exactly cheap. But given the amount of money the facility will save on power, zoo officials estimate that the project will pay for itself within ten years. Holy crap!
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