Field to fork: global food miles generate nearly 20% of all CO2 emissions from food https://perma.cc/B7UH-2EZD
Food miles are measured as tonne-kilometres (tkm), the transport of 1 tonne of food over 1km – the distance travelled multiplied by the mass of the transported food item.

This indicates that transport accounts for 19% of total food system emissions. The transport of fruit and vegetables contributes 36% of food miles emissions – around twice the amount of greenhouse gases (GHG) released during their production.

To mitigate the environmental impact of food, a shift towards plant-based foods must be coupled with more locally produced items, mainly in affluent countries.

https://www.tgoop.com/AnimalFreaks/1341

So yes, obviously more food miles means more pollution, especially if such food is transported via planes instead of ships, but
a) remember that there are hybrid and electric ships too! and Norway is one of the leading country for that, for example Verdens første hybride lasteskip til kai ved Trondheim Havn https://perma.cc/C3TU-LZNP
Elektrisk kjempe skal seile gjennom Kina https://perma.cc/J75G-QMF2
More on
https://www.tgoop.com/EnergyFactsTelegram
https://www.tgoop.com/PollutionFacts
https://www.tgoop.com/ElonMuskPollution
b) remember that Avocado and other things get eaten even by not vegans! is not just a vegan food ...
c) remember that behind the meat there is much more pollution! especially if you waste such meat, instead of eating that. You even need to transport the food for the animals via ship!
d) remember that there is not just pollution due to food transport! Plus we import meat too! (especially if you buy cheap meat).