One giant container ship can emit almost the same amount of cancer and asthma-causing chemicals as 50m cars, study findsWeb Link
"Confidential data from maritime industry insiders based on engine size and the quality of fuel typically used by ships and cars shows that just
15 of the world's biggest ships may now emit as much pollution as all the world's 760m cars.
Low-grade ship bunker fuel (or fuel oil) has up to 2,000 times the sulphur content of diesel fuel used in US and European automobiles.------
85% of all ship pollution is in the northern hemisphere.
Pollution from the world's 90,000 cargo ships leads to 60,000 deaths a year in the US alone and costs up to $330bn per year in health costs from lung and heart diseases.