one of them is kivalina.is bear-year island village is losing up to eight feet of shore to erosion each year. it's long-term survival is at stake. alaska's northern coast has some of the highest shoreline erosion rates the worldld. >> over 20 communities on the coastine of northern alaska have been identified as places where either they have to move or they will have to movove. becaususe they wonon't be able be sustatained wherere they are ananymore. bubut where i is the moneney go come f from to move e those villagages? >> the w warming of f the arcti brings m many destabablizing changes. but at the same time, it opens up the r region to new oppoportunities. >> that shrinkagee of arctic summer sea ice means that people are speculating about the possibility of everything from shipping to oil and gas to additional economic development. ththat might have some rather major implications both domestically and internationally. >> right now, there are two main passages, the northern sea route or the northeast passag