In the last five years many European nitrogen scientists were involved in the production of the European Nitrogen Assessment were organised. The European Nitrogen Assessment (or in short ENA) is the major outcome of the NinE programme, jointly with the COST Action 729 and the NitroEurope IP.

The ENA was publicly launched during the 'Nitrogen and Global Change' Conference, organised in Edinburgh (UK) from 11-14 April, 2011.