The project main outputs will be supply and installation of approx. 100 Internet of Things intelligent air quality measuring sensors evenly separated between all five countries, providing new, real time data through internet - forming network of connected cities jointly monitoring air quality, alongside with cloud based "Open data" system with predictive analytics and advanced machine learning capabilities. The common use of these emerging technologies will clearly demonstrate transnational cooperation leading to resource efficiency and climate change mitigation. In combination with five city specific analysis for air quality monitoring, establishment of common policy framework analysis towards decrease of regional pollutants, SWOT analysis, analysis of counter trends: Scenarios for the Balkan Cities Atmosphere Towards 2030 and 3D MEMO (Eulerian non-hydrostatic prognostic meteorological model for simulation of atmospheric air flow complex terrains), 3D MARS-aero (3D chemical transport model that simulates transport and transformation of gaseous pollutants and atmospheric aerosols) and 3D MIMO (3D Eulerian Reynolds Averaged Navier Stokes (RANS) CFD code for simulating microscale wind flow and dispersion of pollutants in built-up areas) air quality assessments models the project will effectively address resource management efficiency through reduction and monitoring of air pollution The smart phone and tablet applications with "Push notifications" will enable active public awareness rising and engagement towards air pollution reduction and sustainable development behavior. The state of the art instrumentation and methodologies will be combined in order to propose new, easy replicable model for reduction and monitoring of directly harmful to the health of citizens, ecosystems, crops and buildings air pollutants. The common multinational approach will guarantee environmental protection, eco balance and will support the climate change resilience.