How close do you live to the nearest grocery store? I live within ten minutes of at least three chain grocery stores: Kroger, Meijer and Walmart. But places to buy quality, affordable food are not easily accessed by everyone.
There's an idea that's taken hold in the past few years about why it is that poor people, on average, eat less healthy food and have higher rates of obesity. The idea is simply that people in neighborhoods marked by poverty lack access to healthy food choices. Somewhere along the way (most likely starting in the U.K.) a person with an ear for good marketing decided to label these kinds of neighborhoods "food deserts."
Now, there's even a public service announcement dedicated to ending food deserts in the U.S.