Indo-Asian News Service: “Climate change is going to lead to a bigger human migration than we’ve ever seen before,” Koko Warner from the UN University said here on Saturday. Speaking on the sidelines of the Dec 1-12 summit of the UN Framework Convention on Climate Change (UNFCCC), Warner said 24 million people around the world had become climate refugees already, according to an estimate made by the UN High Commissioner for Refugees. Academics estimated that this figure would go up to 50 million by …