Ready For 3 Billion? Marty Matlock, PhD, Executive Director, The Office for Sustainability and Sustainability Academic Programs, University of Arkansas, says he is preaching to the choir, he also states that the choir needs practice because the choir is out of tune and must have a cohesive language to talk about sustainable agriculture. With 3 billion people coming to dinner in the next 40 years, there has to be a conversation about how the people on Earth will continue.