International audienceWe present the problematic of a research in progress, a Franco-Brazilian collaboration between four laboratories (PACTE and Cresson, in the French side and CETESB - the Environmental Agency of the State of São Paulo, the Public Health Faculty of the University of Sao Paulo in the Brazilian side). It aims to develop a culture of risk in exposed populations of risk areas in Sao Paulo and its region to make habitable these inhospitable areas. We first expose the problematic of this research centered on the notion of risk society that analyze this new living environment and explain why dwelling became problematic in risk areas. Then we clear the objective of this research namely the development of risk culture that can ada...