It is not only possible... it's already being done.
Great piece on the Transition initiative the Liege Food Belt, 30 new food coops, 300 producers, 100 schools commiting to local, organic food, a market and House of Sustainable Food, a soup club feeding kids.
And it all came from a question - what change can we concretely effect within our lifetimes? What they arrived at was this: “That in 35 years, one generation, the majority of food consumed in the Liège region would be grown locally in the best ecological and social conditions.”