Former United Nations Secretary-General Ban Ki-moon on Monday led an intergenerational dialogue meeting with delegates.
The meeting took place at Wangari Maathai Institute for Peace and Environmental Studies, Nairobi.
Ban Ki-moon planted a tree during the event.
Leaders who attended included African Development Bank President Akinwumi Adesina, former First Lady of South Africa Graça Machel, Sports CS Ababu Namwamba and UON vice-chancellor Stephen Kiama among others