For those interested in eating locally to help environmentally, you should consider this article: Do food miles matter?
Consider this quote:
“But it’s how food is produced, not how far it is transported, that matters most for global warming, according to new research published in ES&T (DOI: 10.1021/es702969f). In fact, eating less red meat and dairy can be a more effective way to lower an average U.S. household’s food-related climate footprint than buying local food, says lead author Christopher Weber of Carnegie Mellon University.”
It comes down to eating better and eating local are good for you and good for the planet too. But read the article: there are lots of good details in it.