Polar bears on the way out

U.S. Ge­o­log­i­cal Sur­vey sci­en­tists do not hold out much hope that car­bon di­ox­ide can be turned around in time to help the po­lar bears... clipped from www.world-science.netReport: Most polar bears to die out by 2050Two-thirds of the world’s po­lar bears will be killed off by 2050 — and the en­tire