According to International Maritime Organization (IMO) estimates, world shipping is responsible for about 3 per cent of global CO₂ emissions. Of the total emissions from the transportation sector, shipping accounts for 10 per cent, road traffic 73 per cent and air traffic 12 per cent. Losses from pipelines contribute 3 per cent, and rail traffic 2 per cent. Experts predict that, unless further measures are taken to protect the climate, emissions from the transportation sector will double by 2050. From shipping they could approximately treble.

8.1 > Of all modes of transportation, ships are unbeatable in terms of efficiency. © maribus (after IMO 2009)