Climate change has become one of the most critical concerns for mankind and urgent action is needed. The European Union (EU) Global Strategy of 2016 also considers climate change as a severe factor that may disrupt economic growth and endanger both citizens and territory. The International Maritime Organization (IMO) sought, but failed to reach, a binding international instrument to reg- ulate shipping pollution. Consequently, the EU decided to act approving Regulation 2015/757 on the monitoring, reporting and verification (MRV) of carbon dioxide emissions from maritime transport. This article analyses the different kinds of jurisdictions foreseen in the United Nations Convention on the Law of the Sea (UNCLOS), the role of current actors and the latest steps taken by the IMO.