zoo's

By combining elephant poop with generous contributions from other species and human garbage, it will convert 90% of the zoo's total waste stream into clean energy and reduce the zoo's landfill contributions by 1.5 million pounds annually -- a savings of $150,000.

Mickey Goodman: 7 Ways to Have Fun and Go Green in Denver Mickey Goodman 2011

Ever wonder how much "need" was involved when a Mountain lion kills every single animal in a petting zoo's menagerie?

Elderly Women Charged With Beating Fawn To Death 2009

Like all federal offices and installations caught in the budget battle, the zoo's mission was disrupted.

National Zoo reopens, but it's far from business as usual 2011

By combining elephant poop with generous contributions from other species and human garbage, it will convert 90% of the zoo's total waste stream into clean energy and reduce the zoo's landfill contributions by 1.5 million pounds annually -- a savings of $150,000.

Mickey Goodman: 7 Ways to Have Fun and Go Green in Denver Mickey Goodman 2011

By combining elephant poop with generous contributions from other species and human garbage, it will convert 90% of the zoo's total waste stream into clean energy and reduce the zoo's landfill contributions by 1.5 million pounds annually -- a savings of $150,000.

Mickey Goodman: 7 Ways to Have Fun and Go Green in Denver Mickey Goodman 2011

Across Connecticut Avenue from the zoo's front gate, the shops and restaurants wilted for the lack of zoo visitors during an already slow time of year.

National Zoo reopens, but it's far from business as usual 2011

Travis Dove for The Wall Street Journal Jayne Owen Parker, right, the zoo's director of conservation education, picked a series of posters designed by Brittney King and Patrick McQueen with the 'Ugly's only skin deep' slogan.

Seeking Respect for the Snot Otter 2011

Despite various PR hurdles—hellbenders are cannibals, for example—the zoo's nonprofit arm is gamely trying to popularize the creature.

Green Movement's New Mascot: the Slimy Snot Otter Leslie Eaton 2011

Hayley McWilliams, director of retail for the zoo's shops, was particularly taken by a T-shirt design that, against all odds, made the hellbender look like a superhero.

Green Movement's New Mascot: the Slimy Snot Otter Leslie Eaton 2011

By combining elephant poop with generous contributions from other species and human garbage, it will convert 90% of the zoo's total waste stream into clean energy and reduce the zoo's landfill contributions by 1.5 million pounds annually -- a savings of $150,000.

Mickey Goodman: 7 Ways to Have Fun and Go Green in Denver Mickey Goodman 2011