Whenever a steer or cow leaves a farm in Michigan or goes to a slaughterhouse, it passes by a tag reader, and its ID number goes to a central computer that keeps track of every animal's location. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Genetically modified wheat has been discovered growing in a field in Oregon. GMO wheat is not approved for sale in the U.S. Above, a wheat field in Arkansas. Danny Johnston/AP hide caption

itoggle caption Danny Johnston/AP

At Michigan State University's Clarksville Research Station, researchers apply pollen by hand to tart cherry blossoms, in order to breed new varieties. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

A bee inspector checks on a frame of bees to assess the colony strength near Turlock, Calif., in February. More than 30 percent of America's bee colonies died off over the winter. Gosia Wozniacka/AP hide caption

itoggle caption Gosia Wozniacka/AP

Rice farmers in Indonesia plant rice seedlings using the "system of rice intensification." Courtesy of SRI International Network and Resources Center hide caption

itoggle caption Courtesy of SRI International Network and Resources Center

Eduardo Somarriba is a researcher at the Center for Tropical Agricultural Research and Education in Turrialba, Costa Rica. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Luis Fernando Vasquez has been a coffee farmer in the central valley of Costa Rica his entire life. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Workers separate beans in the coffee warehouse in Yirgacheffe, Ethiopia. Coffee originated in Ethiopia, but now grows in more then 50 countries around the world. Michael Tsegaye/Bloomberg via Getty Images hide caption

itoggle caption Michael Tsegaye/Bloomberg via Getty Images

Palestinians unload bags of flour donated by USAID, or the United States Agency for International Development, at a depot in the West Bank village of Anin in 2008. Mohammed Ballas/AP hide caption

itoggle caption Mohammed Ballas/AP

Pakistani aid workers offload USAID food supplies from an Army helicopter in Kallam Valley during catastrophic flooding in 2010. Behrouz Mehri/AFP/Getty Images hide caption

itoggle caption Behrouz Mehri/AFP/Getty Images

Workers clear honey from dead beehives at a bee farm east of Merced, Calif. Marcio Jose Sanchez/AP hide caption

itoggle caption Marcio Jose Sanchez/AP