Title: Disappearing polar bears and permafrost
Subtitle: is a global warming tipping point embedded in the ice? : hearing before the Subcommittee on Investigations and Oversight of the Committee on Science and Technology, House of Representatives, One Hundred Tenth Congress, first session, October 17, 2007.
Subjects: Greenhouse gases, Permafrost, Global temperature changes, Polar bear, Climatic factors, Effect of greenhouse gases on, Environmental aspects of Global temperature changes, Sea ice, Environmental aspects
Places: Arctic regions