Former U.S. President Bill Clinton (C), announces a pledge to accelerate clean energy technology development by Jim Rogers (L), CEO of Duke Energy and  Wang Yusuo (R), chairman of Chinese energy producer ENN Group, at the Clinton Global Initiative, in New York, September 23, 2009. About 1,200 participants including heads of state, business leaders, humanitarians and celebrities will attend the fifth annual Clinton Global Initiative (CGI) which started on Tuesday. Reuters Pictures 2 months ago

Former U.S. President Bill Clinton (C), announces a pledge to accelerate clean energy technology development by Jim Rogers (L), CEO of Duke Energy and Wang Yusuo (R), chairman of Chinese energy producer ENN Group, at the Clinton Global Initiative, in New York, September 23, 2009. About 1,200 participants including heads of state, business leaders, humanitarians and celebrities will attend the fifth annual Clinton Global Initiative (CGI) which started on Tuesday.