Barry Estabrook says the common knowledge that locally grown food is the most sustainable form of agriculture is incomplete and should allow for regional distribution networks. "Last week, Richard Pirog, the associate director of Sustainable Agriculture at Iowa State University, said larger regional food economies might be the solution. 'We're finding that you get some of the benefits of local systems and some of the efficiencies of the broader national system,' he said. 'They're the best of both worlds.'"