Writer Arlo Crawford (left) with his father, Jim Crawford, an elder statesman of the organic farming movement who dropped out of law school in 1972 to grow vegetables. Melanie McLean/Courtesy of Henry Holt and Co. hide caption

itoggle caption Melanie McLean/Courtesy of Henry Holt and Co.

When families give up farming and move away, it drains life out of small communities. Dan Charles/NPR hide caption

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David Ng (right) and Amanda Furrow, Customs and Border Protection agricultural specialists, inspect wheat for insects and alien seeds at a port in Baltimore, Md. Dan Charles/NPR hide caption

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Allen Peterson's farm, near the city of Turlock, Calif., lies next to a concrete-lined canal full of water. He's one of the lucky ones. Dan Charles/NPR hide caption

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Farmworkers pull weeds from a field of lettuce near Gonzales, Calif. Salinas Valley farms like this one rely on wells, which haven't been affected much by the drought. George Rose/Getty Images hide caption

itoggle caption George Rose/Getty Images

A fully formed coffee berry, left, is shown next to a damaged coffee berry due to drought, at a coffee farm in Santo Antonio do Jardim, Brazil on Feb. 6. Paulo Whitaker/Reuters/Landov hide caption

itoggle caption Paulo Whitaker/Reuters/Landov

Wheat fields like this one could yield wheat with less zinc and iron in the future if they are exposed to higher levels of CO2, according to the journal Nature. Zaharov Evgeniy/iStockphoto.com hide caption

itoggle caption Zaharov Evgeniy/iStockphoto.com

Miller with one of his cows. Dan Charles/NPR hide caption

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A line of fire turns brown grass into black earth. Dan Charles/NPR hide caption

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Wal-Mart is promising to drive down the prices of organic food by bringing in a new company, WildOats, to deliver a whole range of additional products. Wal-Mart/Flickr hide caption

itoggle caption Wal-Mart/Flickr

Backers of the new Open Source Seed Initiative will pass out 29 new varieties of 14 different crops, including broccoli, carrots and kale, on Thursday. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Live tilapia raised by Blue Ridge Aquaculture are loaded into a truck bound for New York. Dan Charles/NPR hide caption

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