Polar Bears http://nwpr.org en How Polar Bears At Oregon Zoo Help Us Understand Climate Change http://nwpr.org/post/how-polar-bears-oregon-zoo-help-us-understand-climate-change <p>A polar bear at the Oregon Zoo are helping researchers at the U.S. Geological Survey study how climate change is affecting wild Arctic polar bears. For EarthFix, Cassandra Profita reports.</p><p> Wed, 31 Jul 2013 13:57:11 +0000 Cassandra Profita 31802 at http://nwpr.org How Polar Bears At Oregon Zoo Help Us Understand Climate Change