Chipotle's announcement that it has removed all GMOs from its menu items is part of a growing food industry trend. From left: Nestle chocolates, Chipotle tortillas, Diet Pepsi, Kraft Macaroni & Cheese Dinner, a Subway sandwich. All of these companies have dropped ingredients over the past year in response to consumer demands. Meredith Rizzo/NPR; iStockphoto; PepsiCo; iStockphoto; iStockphoto hide caption

itoggle caption Meredith Rizzo/NPR; iStockphoto; PepsiCo; iStockphoto; iStockphoto

Workers prepare burritos at a Chipotle Mexican Grill in New York. The restaurant chain has stopped serving pork in about one-third of its U.S. locations. Richard Levine/Demotix/Corbis hide caption

itoggle caption Richard Levine/Demotix/Corbis

Chipotle Mexican Grill launched The Scarecrow, an arcade-style adventure game for iPhone, iPad and iPod touch. Business Wire hide caption

itoggle caption Business Wire

The antibiotic-free pigs roam freely on Niman Ranch in Iowa. Sarah Willis/courtesy Niman Ranch hide caption

itoggle caption Sarah Willis/courtesy Niman Ranch