The former UN special envoy for Sudan, Volker Perthes, is warning of a further deterioration in the humanitarian situation created by the country’s civil war. “It’s getting worse because famine is looming,” the political scientist told the German broadcaster ZDF on Wednesday. He said that 18 million people, almost half the population of the country in north-east Africa, are threatened by acute hunger. “We have four or five children dying of hunger every day. And that will increase over the coming weeks and months.” Sudan’s farmers would normally be harvesting their crops now, but this year no …