Even within the borders of one of the world’s top agricultural countries, healthy food can be hard to come by. Many Americans reside in food deserts—communities where retailers offering fresh food are scarce but fast-food restaurants and convenience stores selling prepared foods can abound...
Scientists are still exploring the links between food deserts and health by investigating how the nonavailability of fresh food may spur obesity, diabetes and other diet-related conditions. One 2006 study found an association between the presence of supermarkets and lower obesity rates. Convenience stores, on the other hand, were associated with higher rates.
(Note: Click on the chart above for a larger more readable set of charts.)
http://www.scientificamerican.com/article.cfm?id=high-and-dry-in-the-food
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