Fossil Fuels Are 40% of Freight Shipping Tonnage, but Half Its Fuel Use (cleantechnica.com)
53 points by choult 2 hours ago
bryanlarsen 42 minutes ago
The top graph makes it seem much more dramatic than it is.
Maritime shipping is very efficient, and consists of a very small fraction of overall petroleum usage.
Road transportation uses about 20x as much fuel as ocean shipping, planes use about 2x as much, and trains about the same amount.
The typical rule of thumb is that about 40% of the energy in a barrel of petroleum is lost before it goes into your gas tank. And the two big factors are the energy required to do the refining and delivering the fuel from the refinery to the gas station. Shipping the crude from the oil field to the refinery is a factor, but a small one in comparison.
This 40% is the main reason why driving an EV emits less carbon than driving an equivalently sized gas vehicle even if you're topping up that EV with the dirtiest electricity you can find.
P.S. maritime shipping typically uses very dirty fuel. We'll probably notice the reduction in sulfur pollution more than the reduction in CO2.
P.P.S 3% of a very large number is still itself a large number, so it's still worth looking for solutions.
lukevp 3 minutes ago
Why is the EV better? Because electricity transmission is more efficient than gas? What about the losses in the electricity transmission and the batteries and the conversion to motive force in the motor? Is it way less than that 40%? And wouldn’t there be more than 0% losses because refinery -> power plant shipping?
I’m pro EV by the way, I just want to understand your point better. Being able to go all the way to transportation using clean energy is an obvious benefit of EVs. The “dirty electricity” angle is less obvious to me.
mynegation an hour ago
To summarize: 40% of tonnage but 50% of tonnage-kilometres. I thought freight volume would be measured in ton-kilometres in the first place.
braiamp 40 minutes ago
To further give context: the article is saying that most of the fuel transported around is done for long distances, so when something removes fuel use in the consumer side it has a double dip effect: less fuel consumed and less fuel used to transport the fuel, since long fuel supplies route diminish. It's a third order of thinking and that's why it's confusing. The article then argues that reducing that consumption in the buyers side is more effective:
> This is the part that fuel-first narratives tend to miss. In a serious energy transition, coal demand falls, oil demand falls, and gas demand falls. That means fewer bulk carriers and tankers moving fossil energy around the world. The maritime sector does not have to find a one-for-one replacement fuel for all of that work, because a material share of the work should disappear.
I would argue that chipping away at all three sides of the equation reducing the amount of fuel used, the amount of fuel used for transport and transporting things using other that fuel are worth pursuing.
netsharc 2 hours ago
What the hell is this headline and the article trying to say..?
"40% of horse-drawn carriage cargo is hay, but 50% of what we feed horses is hay".
So what?
crazygringo an hour ago
I swear to God, I've read the article twice and I've read the comments replying to your question and I still have no idea.
I think the problem is that, for any given sentence, it is unclear whether the author is talking about the fuel a ship is burning to move its cargo, or fuel that the ship is transporting to a destination.
I do understand that the article is making some kind of distinction between the two, but it is so terribly written that it's just impossible to figure out which one it's talking about at which point. Or at least I certainly don't care to waste my time "solving" the article like it's some kind of linguistic puzzle.
I'm not sure I've ever come across an article that needed an editor to improve its clarity more than this one.
halJordan 2 hours ago
From the fucking article: Fossil fuel cargoes travel long distances in very large flows, so their decline removes more than a proportional share of cargo mass. It removes a larger share of the ocean work and the fuel burned to do that work.
And if I can get on my soapbox. This same problem (carrying fuel to feed the transportation unit) is well studied in medieval England because it was one of the main determinants of where cities and castles were placed (albeit unknowingly at the time). And we see what happened in England when they were able to get out from under feeding oxen.
zahlman an hour ago
> It removes a larger share of the ocean work and the fuel burned to do that work.
Sure, but as long as ratio of fuel moved:fuel used is good enough, people won't care (as demonstrated by historical data). This isn't an argument that leads to change. For those not already convinced of the climate crisis, you'll need to lean on economics.
megaman821 26 minutes ago
idontwantthis an hour ago
https://acoup.blog/2022/07/15/collections-logistics-how-did-...
The Tyranny of the Wagon
bryanlarsen an hour ago
dboreham an hour ago
See also Coals from Newcastle.
penteract an hour ago
It's saying that 40% of the tons of cargo loaded onto ships is fossil fuels, but this makes up about 50% of ton-miles, because fossil fuels travel further on average than other cargo. Not the easiest headline to correctly parse.
gertlex an hour ago
I read this and another half-dozen replies to the parent comment (but not the article, of course...) and was still confused. This comment was the clearest to getting me to understand it.
Example contributors as I presently understand it:
- we transport fossil fuels further around world (i.e. Middle East to the US)
- we transport most other goods some shorter distances
- iron ore transport is "up there" with fossil fuels; high ton-miles of transport.
And of course the cost of transport for a good is a function of distance, a la the rocket equation mentioned in other comments.
And the article is focused on making this point in the context of the effect of reduced demand for fossil fuels and steel (iron ore) on maritime demand. (which is interesting, and totally not what the article title was leading my brain to think about)
Edit: And then I went and actually looked at the figure at the top of the article; guess the real topic is yet a different framing than what I comment on above!
joss82 an hour ago
That is not what I understood from the article. What I understand is:
Fossil fuels are 40% of freight tonnage, but transporting them fuels is responsible for 50% of the total freight fuel consumption.
I assume 99% of freight uses fossil sources as fuel.
mithras an hour ago
So basically a very friendly version of the rocket equation.
joss82 an hour ago
grey-area an hour ago
It’s trying to say what if we didn’t have to haul energy around from place to place but generate it closer to consumption - we could move more useful stuff instead.
pfortuny 2 hours ago
It is so weird that it makes 40% sense of 50% its length.
bestouff 2 hours ago
So 10% is a lot.
sourcegrift an hour ago
The preposition ("butt") is wrong
metalspot an hour ago
The chart at the top of the article makes it clear that the entire thing is pure fantasy