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.

Empty shelves where eggs should be at a Whole Foods Market in Washington, D.C. The store blames increased demand for organic eggs. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Chris Costa and one of her chickens on her farm in Downingtown, Pa. Costa and her partner, T.J., found the land for this farm through a sustainable agriculture program. Emma Lee/WHYY hide caption

itoggle caption Emma Lee/WHYY

A Bhutanese farmer puts her harvest of chilies on the roof of a shed to dry and protect it from wild boars, deer, and monkeys in 2006. James L. Stanfield/National Geographic/Getty Images hide caption

itoggle caption James L. Stanfield/National Geographic/Getty Images

Laura Chase, a member of the MOOMilk dairy cooperative, sweeps her barn in a film still from documentary, Betting The Farm. Pull-Start Pictures hide caption

itoggle caption Pull-Start Pictures

Farmer Alan Madison fills a seed hopper with Monsanto hybrid seed corn near Arlington, Illinois, U.S. A group of organic and other growers say they're concerned they'll be sued by Monsanto if pollen from seeds like these drift onto their fields. Daniel Acker/Landov hide caption

itoggle caption Daniel Acker/Landov

Edgar Jaime (right) and his brother Jose Luis unload organic vegetables from their farm in Santa Monica, Calif. Now that U.S. and European organic standards are equivalent, more American organic farmers will be able to export to Europe. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

Maryland farmer Josie Johnson listens to a lecture on extending the farming season using caterpillar tunnels. The lesson was part of a conference for young farmers held in Tarrytown N.Y., in early December. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR