Some claim that ethical considerations, and especially those of justice, should be eliminated from global climate policy in favor of those based largely on narrow economic self-interest. To illustrate the dangers of this position, I argue that approaches that aim to avoid justice are at risk of endorsing climate extortion, a clear violation of ethical norms. Consequently, norms of global, corrective and intergenerational justice must be incorporated in any reasonable and feasible climate policy that does not violate intelligibility constraints.