This interview with Dr. Steven Amstrup was commissioned by Polar Bears International.  It is an informational interview that discusses the effects of global climate change on the polar bear population.  Dr. Steven C. Amtrup is the team leader for the U.S. effort to study the polar bears of the Southern Beaufort Sea. He works with the U.S. Geological Survey's Alaska Science Center. He also led the effort to map polar bear maternity denning sites in the Alaska National Wildlife Refuge (ANWR) and is the author of the chapter on polar bears in "Wild Mammals of North America: Biology, Management, and Conservation," edited by George A. Feldhamer, Bruce C. Thompson, and Joseph A. Chapman.