Sharm el Sheikh (Egypt) (AFP) – The 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. “Humanity has a choice: cooperate or perish,” Guterres told the UN COP27 summit. “It i…