How The Polar Bear Enclosure Will Keep Elephants Warm At The Oregon Zoo...
Elephants and polar bears don’t really have... ...ated just for them, and now those climate control systems are working together to make sure the critters ar... ...ic bill.The Oregon Zoo is using an innovative new heating system that utilizes an underground geothermal l...
https://www.neatorama.com/2014/09/11/How-The-Polar-Bear-Enclosure-Will-Keep-Elephants-Warm-At-The-Oregon-Zoo/
