Climate change is a global challenge that cuts across all aspects of our society and deliberations over how much, and in what way, greenhouse gas emissions (GHG) should be reduced are still at the core of international climate negotiations. However, GHG emissions resulting from the use of international bunker fuels (IBF) in the international aviation and maritime industries have remained mostly unregulated. Article 2.2 of the Kyoto Protocol excluded both of these sectors from its targets, delegating to the International Maritime Organization (IMO) and the International Civil Aviation...