Chicago, aka hog butcher for the world, is home to The Plant, a meat-packing factory-turned-food production center and farmer’s market. The three-story building, vintage 1925, sits squarely on the border of a gritty south side industrial and a residential neighborhood. It is a hotbed of activity where recycling is paramount. A tour of The Plant gives you a chance to see its “food loop” in action, surrounded by re-engineered building space and salvaged materials. On the first