The Norwegian Meteorological Institute (MET Norway) hosts the western air pollution modelling centre of the European Monitoring and Evaluation Programme (EMEP MSC-W). The EMEP MSC-W model has been developed over more than 30 years for the calculation of sulphur and nitrogen deposition, as well as for tropospheric ozone and particulate matter (PM). Although traditionally used at the European scale with resolutions of ca. 50km, the current model has been applied both globally (0.5 degrees resolution) and for near-urban scale (1-2 km) within the EMEP4UK project. MET Norway has a long history in authoritative modelling of the long-range transport of pollution, especially for the UNECE LRTAP Convention. MET Norway will engage to develop N-modelling capabilities, including atmosphere-biosphere simulations of future N-scenarios in different economic and climate change scenarios.