I could argue both sides of the question of whether the globalization of our food supply is sustainable or not (and over the years I have). In the end I’ve personally concluded it exists and all of us choose to support it (or not). I do every week at my local farmers market and again with my food dollar every time I go to the grocery store. The fact is buying local is very sustainable from a miles to market standpoint but as I’m sure you are already aware if you live in Boston or Chicago right now, your options become extremely limited in the winter. The goal of this post was educational- perhaps I should have made it clearer that if you choose to buy berries in the winter the options are better than they were. I also agree that a post measuring how efficient the various methods of getting food to market would actually be a good stand alone topic (Rail, boat, truck- for long haul and local).