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Corby Kummer, an Atlantic senior editor and the curator of theatlantic.com's food channel, and Preston Green, Generation Organic farmer from southwest Wisconsin, discuss the Generation Organic "Who's Your Farmer?" tour and Walmart's decision to use more local farms as suppliers for their stores and what it might mean for local farmers.

Caffeine is about the last non-prescription drug you can use without social stigma, and a growing number of Americans are obsessed with the finer points of getting it. Corby Kummer, who writes about food for the Atlantic Monthly, tells us about a brewing device he thinks is ...