The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) is the intergovernmental body which assesses the state of biodiversity and of the ecosystem services it provides to society, in response to requests from decision makers. IPBES is placed under the auspices of four United Nations entities: UNEP, UNESCO, FAO and UNDP and administered by UNEP. Its secretariat is hosted by the German government and located on the UN campus, in Bonn, Germany. One thousand scientists from all over the world currently contribute to the work of IPBES on a voluntary basis. They are nominated by their government or an organisation, and selected by the MEP. Peer review forms a key component of the work of IPBES to ensure that a range of views is reflected in its work, and that the work is complete to the highest scientific standards.