Farmers on both sides of the Canada-US border have chosen sustainability as a rallying cry. It’s a familiar term to the urban politicians and others they’re trying to influence. I think most people associate the term with environmental sustainability, though, and farmers will have to work hard to explain that their definition includes economic viability. Sustainability doesn’t pack up into a tight 30-second elevator speech the way their last slogan, Farmers Feed Cities, did. I cover the Ontario Agriculture Sustainability Coalition-led  campaign in my Urban Cowboy column in today’s Guelph Mercury.