My research topics are agriculture and food, within the concept of food system. I consider this food system as a whole as a socio-ecological system. It is formed by ecological and social factors, complex, heterogeneous in time and space with non-linear mutual influences. Production, distribution and consumption from farm to fork are the productive units of the food system, which are influenced by the market, politics, society and the environment, at different spatial scales. The instability present in this socio-ecological system is essential for the emergence and diffusion of innovations. The theme of interactions between the food system and health is gaining importance in ongoing projects.