Shipping emissions in ports are substantial, accounting for 18 million tonnes of CO2 emissions, 0.4 million tonnes of NOx, 0.2 million of SOx and 0.03 million tonnes of PM10 in 2011. Around 85% of emissions come from containerships and tankers. Containerships have short port stays, but high...

Shipping could – in one way - be considered a relatively clean transport mode. This is particularly the case if one takes the angle of emissions per tonne-kilometre. Typical ranges of CO2 efficiencies of ships are between 0 and 60 grams per tonne-kilometre, this range is 20-120 for rail...