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

Genetically modified to be enriched with beta-carotene, golden rice grains (left) are a deep yellow. At right, white rice grains. Isagani Serrano/International Rice Research Institute hide caption

itoggle caption Isagani Serrano/International Rice Research Institute

Wild bees, such as this Andrena bee visiting highbush blueberry flowers, play a key role in boosting crop yields. Left photo by Rufus Isaac/AAAS; Right photo courtesy of Daniel M.N. Turner hide caption

itoggle caption Left photo by Rufus Isaac/AAAS; Right photo courtesy of Daniel M.N. Turner

Stewart Parnell (center), former president of the now-defunct Peanut Corp. of America, is one of four executives indicted over a 2009 outbreak of salmonella. Mark Wilson/Getty Images hide caption

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A corn field is shrouded in mist at sunrise in rural Springfield, Neb. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP