Pollution

Unfortunately, as farmers increasingly plant mostly wheat, rice and corn (including for animal feed), more than 75 percent of crop genetic diversity has disappeared since the 1900s, "And that relentless march toward monoculture," bioGraphic noted, "leaves the homogenous fields more vulnerable to devastation by drought, pests and disease."10 Philip Lymbery, chief executive of Compassion in World Farming (CIWF), noted that ending the practice of grain-feeding animals could actually feed another 4 billion people.