Cincinnati Zoo, more than any facility I can think of in North America, has committed itself to being as sustainable a facility as possible. The latest effort is the Leed-certified Big Cat Canyon Best Projects Small Project: Cincinnati Zoo & Botanical Garden Cat Canyon | ENR: Engineering News Record | McGraw-Hill Construction!
That is great news about Cincinnati Zoo! Happy Hollow Park & Zoo in San Jose, California, is also a strong contender for being one of the "greenest" American zoos in the nation. Here are the facts: Happy Hollow Park and Zoo :: We've Gone Green!