Applying our Traveling Salesman model to this map, it’s clear that the farmers’ market is the least efficient model possible, if you are measuring efficiency in terms of delivery miles driven and gallons of diesel burned. To properly restructure this model to be as efficient as its proponents believe it to be, you’d drive a single truck in a calculated route to visit each farm in the morning, sell all the goods in a single store, and then discard or donate the leftover food (why double the driving miles to return perishable goods to the farmers?).
Don’t get me wrong, I love farmers’ markets. We go to our local one sometimes and it’s a fun family event for us. We love the giant, wonderful tomatoes and strawberries that you can’t get at the supermarket. I’d hate to see the experience replaced by the efficient alternative I just described, but then, I understand that farmers’ markets are more of a premium boutique community experience than an efficient (or “green”) way to buy food. The real reasons to enjoy your farmers’ market have nothing to do with it being somehow magically environmentally friendly. It’s the opposite.
Too often, environmentalists are satisfied with the mere appearance and accoutrements of environmentalism, without regard for the underlying facts. Apply some mathematics and some economics, and you’ll find that a smaller environmental footprint is the natural result of improved efficiency.