LANSING, Mich., March 4 (UPI) -- If U.S. adults have access to a vehicle they have access to produce, but if they have to walk to get food, finding lettuce may be impossible, researchers say.
Phil Howard and Kirk Goldsberry, both of Michigan State University, developed interactive maps using geographic information systems that offer a visual perspective of urban food deserts -- areas where food, especially fresh food, particularly produce, is hard to find.