The United Nations Environment Assembly is the world’s highest-level decision-making body on the environment, with a universal membership of all 193 Member States. The Assembly meets biennially in Nairobi, Kenya, to set priorities for global environmental policies and develop international environmental law. Through its ministerial declaration and resolutions, the Assembly provides leadership, catalyzes intergovernmental action on the environment, and contributes to the implementation of the UN 2030 Agenda for Sustainable Development. The UN Environment Assembly is also the governing body of the UN Environment Programme. It has had five sessions starting in 2014 and was preceded by the Governing Council of the UN Environment Programme, which was composed of 58 member States. 

The fifth session of the UN Environment Assembly (UNEA-5) took place in a two-step approach. The first session of UNEA-5 (UNEA-5.1) was held online on 22 - 23 February 2021, and the resumed in-person session of UNEA-5 (UNEA-5.2) took place online and in Nairobi on 28 February – 2 March 2022. 

The UN Environment Assembly is now preparing for its sixth session that is to take place from 26 February to 1 March 2024 at the headquarters of the United Nations Environment Programme, in Nairobi, Kenya.