It really depends, for example out-of-season local tomatoes grown in a greenhouse in norther Europe are much more energy-unefficient than shipping them from Mor

It really depends, for example out-of-season local tomatoes grown in a greenhouse in norther Europe are much more energy-unefficient than shipping them from Morocco. On the other hand, I remember buying live lobsters between $5 and $8 a pound in a Boston grocery store. According to this article that would be a very small markup (and maybe sometimes lobsters were a loss leader).