Global climate change has important implications for the way in which benefits and burdens will be distributed amongst present and future generations. As a result it raises important questions of intergenerational justice. It is shown that there is at least one serious problem for those who wish to approach these questions by utilizing familiar principles of justice. This is that such theories often pre-suppose harm-based accounts of injustice which are incompatible with the fact that the very social policies which climatologists and scientists claim will reduce the risks of climate change will also predictably, if indirectly, determine which individuals will live in the future. One proposed solution to this problem is outlined grounded in terms of the notion of collective interests.