In the fight against climate change and coping with pressures arising from urbanization, cities worldwide provide solutions for modifying air pollutant emissions and thermal comfort. The CousCOUS project answers to possible challenges of air quality by helping cities plan climate-healthy urban areas, considering future traffic flows and population structures alike. CousCOUS combines the fields of artificial intelligence, atmospheric and social sciences to an unprecedented extent and therefore advances the state of scientific research in all disciplines involved. The project provides decision-makers and city planners globally with novel, relevant information and tools for creating future sustainable cities. The consortium utilizes and analyzes high-resolution data from various sources, including population, climate and traffic data, and works tightly both together as well as in co-operation with relevant stakeholders.