Food deserts are areas where affordable, healthy food is scarce. Supermarkets are non-existent in many small towns and low-income inner-city neighborhoods. That leaves residents with few options other than paying high prices in convenience stores. The problem is particularly acute when residents lack access to a car. Urban geographer Adam Pine of UMD has highlighted the problems of food deserts in Duluth in work highlighted in a National Public Radio story. Adam Pine was an undergraduate student in my Sustainable Cities class at the University of Minnesota back when I taught there. Way to go Adam!