>probably consumes the least fossil fuels per tonne I don't believe that the commenter to whom you're replying is referring to the use of fossil fuels to trans

>probably consumes the least fossil fuels per tonne I don't believe that the commenter to whom you're replying is referring to the use of fossil fuels to transport the ship (which I believe has to be towed.) They seem to be referring to the fact that it is for processing fossil fuels. It's about production, not consumption.