The two main centers of the UN activity in Africa are Nairobi, Kenya and Addis Ababa, Ethiopia. There are also many regional and country offices of UN system entities in Africa. The UN Environment Programme (UNEP) and the UN Human Settlements Programme (UN-HABITAT) have their main offices in Nairobi. UNEP aims to provide leadership and to encourage partnership in caring for the environment. It is a lead UN actor in the fight to adapt to and mitigate climate change. UN-HABITAT works towards a better urban future. It promotes sustainable human settlements, development and the achievement of adequate shelter for all.
The documents link provides ‘Document System Search’ which allows searching for UN documents by keywords.
More details: http://www.un.org/en/sections/where-we-work/africa/