Thesis: The four chapters of this thesis aim to better understand citizens' attitudes towards environmental policies. The first chapter assesses the redistributive impact of the French carbon tax. It shows that the carbon tax is regressive, but could be made progressive if its revenue were returned uniformly to all households. However, the policy would generate significant horizontal redistributive effects and penalize a large share of modest households. Based on a new survey with a large representative sample, the second chapter co-authored with Adrien Fabre shows that the French are opposed to the carbon tax even if its revenue is returned to them uniformly. This rejection goes hand in hand with strongly rooted pessimistic perceptions of the effects of the policy, which can be explained by the respondents' mistrust. Our analysis shows, however, that when households are convinced of the objective effects of the policy – on their purchasing power, on the environment, and in redistributive terms – their support increases very significantly. The third chapter, based on the same survey, is more descriptive. It aims to assess French attitudes towards climate change and the prospects for French climate policy after the Yellow Vest crisis. The fourth chapter, more theoretical, uses a model to study how environmental disasters affect consumption, investment and environmental protection decisions according to people's attitude to risk.