Executive Director of UN Environment (UNEP) Erik Solheim (C) and staff members ride on state-of-the-art bikes donated by China's Mobike at the United Nations Offices in Nairobi, Kenya on March 5, 2018. The United Nations Office at Nairobi on Monday launched a bicycle sharing transport scheme for staff and visitors as part of broader efforts to advance the green agenda. (Xinhua/Jin Zheng)?