That’s a fair point: the source’s location is not the only factor at play. I’m not familiar with your climate/environment, but i assume the native people have/had a diet tailored to their local environment, and that those greenhouses are meant to produce a capitalist “illusion” of abundance of varied/foreign crops. I’m curious if you have resources on that topic.

Also, from a more technical perspective, it’s quite possible to heat greenhouses in an eco-friendly manner. The productions you’re talking about are likely non-organic and not based on permaculture techniques. There are probably permaculture approaches to cultivating in the cold climates (though i’m unaware of them), but even using “conventional” (read “capitalist”) techniques, producing compost from plant or animal (eg. human) waste is a good heat-generating process.

So while your study holds true, the balance in favor of imported goods is likely due to the types of foods consumed and to the industrial techniques used by industry and not due to the distance crossed by the goods itself. Do you agree with this interpretation?