The world population is expected to reach nine billion in the next 50 years. On top of that, the growing middle class in China and other developing countries is adapting a western-style diet…the type of diet that many healthy food advocates say isn’t sustainable, not for humans and not for the environment. Slow Food International is one organization that’s pushing for a return to more traditional eating styles. The head of the organization, Paolo di Croce, visited slow food advocates in Louisville this week. He also sat down with WFPL’s Gabe Bullard to discuss the global lifestyle changes that need to take place in order to foster good, clean and fair food.