Contributor(s): Professor John Broome | Climate change is a moral problem. Through our emissions, each of us causes harm to others - something that generally we should not do. Some people are already suffering great harm from climate change. What should we do to remedy the situation? A solution can be achieved only through the coordinated actions of governments, and difficult ethical analysis is required to choose the right actions. John Broome is the White’s Professor of Moral Philosophy and a Fellow of Corpus Christi College at the University of Oxford.