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A comment on Cheap oil is taking shipping routes back to the 1800s. Parent comment

Re:Cheap oil is taking shipping routes back to the 1800s by JoeAltmaier on Saturday March 05, 2016 @12:41AM (#11228573)
Does that math stack up? Because ships produce something like 20% of the world's air pollution. And there are around 6000 seagoing ships total. That's a lot of cargo; but that's a lot of pollution too.
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Re:Cheap oil is taking shipping routes back to the 1800s by gaadd33 on Saturday March 05, 2016 @02:24AM (#11228765)
Where does that 20% number come from?

https://en.wikipedia.org/wiki/Environmental_impact_of_shippi... indicates that up to 4% of climate change gasses come from ships.

https://en.wikipedia.org/wiki/Environmental_impact_of_transp... has a breakdown of CO2 per ton-mile. It shows that ships are the most efficient followed by zeppelins and trucking is the source of 20% of the UK's carbon emissions.

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Re:Cheap oil is taking shipping routes back to the 1800s by Symbiote on Saturday March 05, 2016 @05:00AM (#11229028)
Air pollution might mean pollutants directly harmful to people, like sulphur compounds. Ship exhaust can be a problem in ports.
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