I read through the Meat Guzzler article posted by Brent earlier today, and I found it all very interesting. The article, as well as other posts related to food, got me thinking about how our food gets places; it doesn't just end up in the grocery store, but I had never really thought about it. So I looked into it.
I found an interesting website called Sustainable Table http://www.sustainabletable.org/issues/buylocal/. This one particular article discusses how a concept called a food mile, which is the distance it takes for a piece of produce to go from the farm to your home, works. It compares chain supermarkets to local grocery stores, and the chains' food has to travel 27 times as many miles, on average. The produce at a big grocery store travels an average of 1,500 miles from the farm to us. This is why preservatives and other things are added to help our food make the journey.
In the end, all of those miles our foods travel are aboard some vehicle which runs on fuel. Buying local, as the website suggests, reduces our foods mileage. I had never thought of my food in combination with energy, but it has a lot to do with it. Food is a major part of our lives, we eat a lot of it, which means a lot of food miles traveled and energy consumed.