The first article of my thesis uses Discrete Choice Experiments (DCEs) to investigate the key factors influencing the social acceptability of carbon (CO₂) and hydrogen (H₂) storage projects in France. Two samples were used: one representative of the general French population and another focused on residents living near potential storage sites. While these technologies are essential for achieving carbon neutrality goals, they often encounter local opposition or, at the very least, a lack of public support. The experiments emphasize the importance of information: the study explores how geographical proximity (e.g. the distance between a respondent's home and the proposed storage site) affects risk perceptions and preferences, and whether providing this information alters levels of support or opposition.