World risks 'collective suicide', UN chief warns climate summitThe UN's chief warned Monday that nations must cooperate or face "collective suicide" in the fight against climate change, at a summit where developing countries reeling from global warming demanded more action from rich polluters.Nearly 100 heads of state and government are meeting for two days in Egypt's Red Sea resort of Sharm el-Sheikh, facing calls to deepen emissions cuts and financially back developing countries already devastated by the effects of rising temperatures.'Persisting distrust'Nations worldwide are coping with increasingly intense natural disasters that have taken thousands of lives this year and cost billions of dollars."We, the oceanic states that suffer the harsh effects of your activities, have to be assisted in repairing the damage you cause to us," said Seychelles President Wavel Ramkalawan, whose island nation is threatened by rising waters.COP27 is scheduled to continue through November 18, with ministers joining the fray during the second week."