- with more ships switch to low sulphur diesel and more efficient ships being built, the trend of such pollutant will only decrease;

That’s funny. Buy more expensive fuel and charge consumers and don’t worry about left bunker fuel in millions of gallons that nobody else can use. Bunker fuel will need to get processed more so they can extract what’s left to be used as fuel so as the efficient ships rolls out, old ships that use even cheaper bunker fuel in future will be kept live as long as they can. Why do you think they put those exhaust pipes so high up in air? How about those boat exhaust pipes? You tell me where they are. LOL

- transport by water is the most energy efficient way of moving good around the globe;

How else would you transport? 70% of earth surface is ocean. LOL

- in your calculation, I believe you use the fuel consumption of typical cars, but there’re many trucks and rigs that travel huge mileage thru’ out the continent at much higher fuel consumption, have you consider this? (And many times, they are essential to our ‘consumer’ centric society. We have too much pollution because we consumer too much and unnecessarily.)

Automobiles on road do not use dirty fuel like they do in cargocruise ships. Ships are raping air. That’s why I bought up the cruise ships (Consumers needs vacation!).. They do more damage then cargo ships BTW. They are all equipped with enough electric generators at highest peak temperature to run A/C in ALL rooms. Do you have any idea what that equals to? Think of it like a big hotel that doesn’t have electric wires going in to building but burn fuel to power itself and move itself. LOL

“Twelve of the largest cargo ships pollute more than all automobiles on the planet combined…” IIRC, the original article I read was talking about pollutants like nitrious oxide, not carbon emission. Don’t be confused.

- with more ships switch to low sulphur diesel and more efficient ships being built, the trend of such pollutant will only decrease;
- transport by water is the most energy efficient way of moving good around the globe;
- in your calculation, I believe you use the fuel consumption of typical cars, but there’re many trucks and rigs that travel huge mileage thru’ out the continent at much higher fuel consumption, have you consider this? (And many times, they are essential to our ‘consumer’ centric society. We have too much pollution because we consumer too much and unnecessarily.)

http://www.wisegeek.com/what-is-bunker-fuel.htm

How much of fuel they burn per hour? It depends on wind, current, load, size of ship, number of engines, power of engines, condition of hull, and etc. it’s like asking how many mpg lunar rover can get at year 2015 at June 18th if the earth weather was sunny and I don’t have answer for you. You look it up. Tank size? The ship has stuff on it. It needs to go to drop it off. It needs to do it as cheap as possible and meet target time. It happened yesterday, last week, last month, ten years ago, and 50 years ago… Rinse and repeat. They can carry as much fuel to get the job done.

http://www.dailymail.co.uk/sciencetech/article-1229857/How-16-ships-create-pollution-cars-world.html