Climate change is one of the most important issues we are currently facing. There are many ways in which states can fight climate change. Some of them involve interfering with citizens’ personal lives. The question of whether such interference is justified is under-explored in philosophy. This paper focuses on a specific aspect of people’s personal lives, namely their informational privacy. It discusses the question of whether, given certain empirical assumptions, it is proportional of the state to risk its citizens’ privacy (...) or to risk infringing its citizens’ right to privacy to fight climate change. The main claim this paper argues for is that if fighting climate change and protecting our privacy conflict, we have good reason to fight climate change rather than protect our privacy. (shrink)