model used for point and area sources dispersing over flat terrain on a local scale. The model includes plume depletion by dry or wet deposition and has been updated to handle building effects and the O3-NOx-chemistry. It is not designed for complex terrain or other chemically reactive pollutants. INPUFF-U (Romania) – This model was developed by the National Institute of Meteorology and Hydrology in Bucharest, Romania. It is a Gaussian puff model for calculating the dispersion of radionuclides from passive emission plumes on a local to urban scale. It can simulate accidental or continuous releases from stationary or mobile point sources. It includes wet and dry deposition. Building effects, buoyancy effects, chemical reactions and effects of complex terrain are not included. LAPMOD (Italy) – The LAPMOD (LAgrangian Particle MODel) modeling system is developed by Enviroware and it is available for free. LAPMOD is a Lagrangian partile model fully coupled to the diagnostic meteorological model CALMET and can be used to simulate the dispersion of inert pollutants as well as odors and radioactive substances. It includes dry and wet deposition algorithms and advanced numerical schemes for plume rise (Janicke and Janicke, Webster and Thomson). It can simulate inert pollutants, odors and radioactive substances and it is part of ARIES, the official Italian modeling system for nuclear emergencies operated by ISPRA and by the regional environmental protection agency of Emilia-Romagna, Italy. LOTOS-EUROS (The Netherlands) – the long term ozone simulation – European operational smog (LOTOS-EUROS) model was developed by the Netherlands Organisation for Applied Scientific Research (TNO) and Netherlands National Institute for Public Health and the Environment (RIVM) in The Netherlands. It is designed for modelling the dispersion of pollutants (such as: photo-oxidants, aerosols, heavy metals) over all of Europe. It includes simple reaction chemistry as well as wet and dry deposition. MATCH (Sweden) – A multi-scale atmospheric transport and chemistry (MATCH). A three-dimensional, Eulerian model, suitable from urban to global scale. MEMO (Greece) – A Eulerian non-hydrostatic prognostic mesoscale model for wind flow simulation. It was developed by the Aristotle University of Thessaloniki in collaboration with the Universität Karlsruhe. This model is designed for describing atmospheric transport phenomena in the local-to-regional scale, often referred to as mesoscale air pollution models. MERCURE (France) – An atmospheric dispersion modeling CFD code developed by Electricite de France (EDF) and distributed by ARIA Technologies, a French company. The code is a version of the CFD