While inland transport was included in the 2015 Paris Agreement and international air transport followed suit in 2016, progress in the international shipping sector, which carries 80% of the world’s trade volume, has been more modest. Back in 2011, the International Maritime Organization (IMO) did adopt a set of operational and technical measures to increase the energy efficiency of vessels. Realistically though, it may take about 25-30 years to renew the world’s entire fleet and make all new vessels fully compliant with IMO’s technical requirements.
In any case, focusing only on technical and operational efficiency simply won’t be enough. The demand for maritime transport is growing so quickly that, even when taking all these energy efficiency regulations into account, CE Delft projects that emissions from international shipping could still increase by 20-120% by 2050, while IMO estimates range between 50-250% for different scenarios. This calls for a bolder agenda that includes credible market-based solutions, too.