SIRANESIRANE is a software modeling of air pollution in urban areas.SIRANE software: \(NO2\) concentration in the city of LyonSIRANERISKSIRANERISK is a software modeling of air pollution in urban areas, adapted to the problem of dangerous substances.SIRANERISK software : Evolution of the pollutant plume during an accident of Transport of Hazardous Substances in the city of LyonSLAM - Safety Lagrangian Atmospheric ModelSLAM is a lagrangian software dispersion, SLAM is suitable for industrial impact issues.SLAM software : Evolution of the plume of pollutant emitted by industry.