The “Third Session of the United Nations Environment Assembly (UNEA-3)” was convened on 4-6 December 2017 in Nairobi, Kenya under the overarching theme “Towards a Pollution-Free Planet”. UNEA-3 brought together over 4,300 delegates, including heads of state, ministers and other delegates from more than 170 Member States, UN officials, inter-governmental organizations, business leaders, civil society representatives, activists and celebrities.