> Something like 50% of marine fuel usage is shipping fossil fuels around the world
Note that marine shipping is extraordinarily fuel efficient (from a gCO2/(t*km) basis), so I doubt that it adds a lot on a per ton of fuel basis. We just ship a lot of fossil fuels.
This [1] graph looks to be in the right ballpark from what i remember in school 15 years ago, i didn't verify it in depth but +- an order of magnitude better than the next best method is roughly right
Even though petroleum product shipping accounts for almost 40% of shipping, the surprising efficiency of ocean transport still means that it's not that big an energy cost; a single-digit percentage of the energy content of the shipped oil/gasoline.
But even that is still worth saving - it's a few percent more benefit for electrification.
Marine transport is stupidly efficient and probably won’t influence those numbers much. For the same reasons it’s absolutely okay to eat avocados from overseas. I believe the processing of oil to gas is quite energy intense tho.
Does that 26% include the energy that's involved to ship the fuel in tankers?
Something like 50% of marine fuel usage is shipping fossil fuels around the world