Reuters: The world’s biggest emitters of global-warming greenhouse gases met behind closed doors on Wednesday for a US-sponsored conference as protesters pointed up Hawaii’s vulnerability to climate change. Here are findings on climate change from a February 2007 report by the UN Intergovernmental Panel on Climate Change, which groups 2,500 researchers from more than 130 nations. EVIDENCE OF HUMAN CAUSES * “Most of the observed increase in globally averaged temperatures …