To expand a little, most container ships use bunker crude, which is borderline sludge. It even needs to be heated before being pumped out. But it's cheap and at the size, pressure, and speeds these engines run at they get most of the energy out of just about any fuel.
An important note: as much sulfuric pollution as all the cars in the world. Which is bad enough, but -- for instance -- cars are (probably) still winning on CO2 emissions.
For those who don't follow the link, the 16 ships in question burn the sludge that's left over after refining all the cleaner burning bits out of petroleum. So it's not so much a "quantity of fuel burned" problem as it is that they're burning the worst possible thing you can burn, as far as this sort of pollution goes.
I concur, it's an almost perfect application. So much that most aircraft carriers already use it, not sure what's holding back the private sector (probably safety concerns).
I read somewhere that container ships' fuels are the dirtiest of all fuels used everywhere, which made buying electronics really non-green (since they're all come in ships from the other side of the globe). Anyone here knows how accurate this is?
