epa09349449 Yemeni children collect water from a donated water tank at a slum in Sana’a, Yemen, 16 July 2021. UN Secretary-General Guterres has named Swedish diplomat Grundberg as his new special envoy to conflict-ridden Yemen, to succeed Griffiths who expressed deep regret for failing to end a six-year escalating conflict between Yemen’s Saudi-backed government and the Houthis during his three-year mission. Yemen’s prolonged conflict has plunged the Arab country into the world's largest humanitarian crisis with an estimated 80 percent of its 29 million-population are in need of humanitarian assistance. EPA/YAHYA ARHAB