The United Nations chief warned Monday that Russia’s war on Ukraine is holding “a sword of Damocles” over the global economy, especially poor developing countries that face skyrocketing food, fuel and fertilizer prices and are now seeing their breadbasket “being bombed.” Secretary-General Antonio Guterres told reporters that “Russia and Ukraine represent more than half of the world’s supply of sunflower oil and about 30 percent of the world’s wheat” and that “grain prices have already exceeded those at the start of the Arab Spring and the food riots of 2007-2008.” He told reporters that 45 African and least developed countries import at least one-third of their wheat from Ukraine and Russia, and 18 of them import at least 50%. These countries include Egypt, Congo, Burkina Faso, Lebanon, Libya, Somalia, Sudan and Yemen, he said.