(South African Archbishop Desmond Tutu speaks during a climate justice rally held in Durban, South Africa, Sunday, Nov 27, 2011, ahead of the official start or a two-week international climate conference with about 190 countries beginning upcoming Monday. The U.N.'s top climate official, Christiana Figueres said Sunday she expects governments to make a long-delayed decision on commitments to reduce emissions of climate-changing greenhouse gases, amid fresh warnings of possible climate-related disasters in the future.(AP Photo/Schalk van Zuydam)DURBAN, South Africa (AP) — Global warming already is causing suffering and conflict in Africa, from drought in Sudan and Somalia to flooding in...