Irradiation is most often used to kill insects, parasites, or bacteria in or on spices, which are typically dried outdoors in before being shipped. Lui Kit Wong/MCT /Landov hide caption

itoggle caption Lui Kit Wong/MCT /Landov

Adrian Mesa protests the overuse of antibiotics in meat production outside a Burger King in Coral Gables, Fla. in 2003. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images