Over at Reason they took a look at the issues with using Food Miles as a way to determine the carbon footprint or the environmental impact of the food you are eating.
I found this passage particularly amusing:
Nevertheless, organic food activists in Britain's Soil Association argued for lifting the organic certification from Kenyan food exports because they are brought into Britain on airplanes. Some high-end British retailers have begun slapping a label featuring an airplane on various food products to indicate that they have been air freighted. Kenyan growers cannily responded by launching their own "Grown Under the Sun" label, pointing out that their agricultural production methods emit far less greenhouse gases than many crops grown in Britain do.Personally, I would go with the Kenyan growers.