The two research objectives of the Nemesis team are to investigate how environments and neighborhoods influence health and to explore the impact of mobility and transport on health. As for the first objective, our contribution is to investigate the contextual and environmental determinants of health behaviors and health using detailed spatio-temporal data. As for the second objective, we seek to develop a comprehensive model of the relationship between transport and health integrating the benefits in terms of physical activity of active transport but also exposure to air pollutants and noise as well as the stress suffered. in different modes of transport.