A discussion this past weekend just inspired me to write a little tidbit here. The person I was talking with is very committed to eating bioregionally and made me think about it in a new way. Essentially, she said that she's comfortable buying coffee, bananas, avocados and coconut oil because they never grow around here, but that if it comes to buying a zucchini in winter, she'd rather just wait for them to grow here. It made so much sense and, to me, seems less overwhelming than the 100 mile diet in Maine (which can't be fun, assuming it's possible.)
The "food miles" concept isn't as straight forward as you might think. See this New York Times Article-
http://www.nytimes.com/2007/08/06/opinion/06mcwilliams.htmland so made the issue sort of more confusing for me. so i like the above "personal metric."