The Downtown Eastside neighborhood of Vancouver, British Columbia is often labeled "Canada's poorest neighborhood." But it is there that author and longtime activist Michael Ableman developed a sustainable food movement. Co-founded by Ableman, Sole Food Street Farms has transformed vacant urban land into fertile gardens employing community members struggling with addiction and mental illness. Ableman's new book, "Street Farm," tells the story of Sole Food and its larger mission to encourage small farming in underserved urban cities. We'll talk to Ableman about the book and the urban farming movement.