01631nam 2200421z- 450 991069441780332120080807090337.0(CKB)5860000000021161(BIP)023629011(EXLCZ)99586000000002116120220406c2008uuuu -u- -engDisappearing polar bears and permafrost 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, 20071 online resource (iv, 98 p.) ill0-16-081361-1 Disappearing Polar Bears and PermafrostPolar bearClimatic factorsArctic regionsGlobal temperature changesEnvironmental aspectsArctic regionsPermafrostArctic regionsSea iceEffect of greenhouse gases onArctic regionsGreenhouse gasesArctic regionsPolar bearFrozen groundSea iceGreenhouse gasesGlobal environmental changeNatureTechnology & engineeringSciencePolar bearClimatic factorsGlobal temperature changesEnvironmental aspectsPermafrostSea iceEffect of greenhouse gases onGreenhouse gasesBOOK9910694417803321Disappearing polar bears and permafrost3201528UNINA