Various: In new Wal-Mart stores in the United States, the baseboards and moldings are made of plastic left over from diaper manufacturing. Chipotle, the burrito chain, has installed an energy-producing wind turbine outside a new store in the Chicago suburbs. And a Florida chain called Pizza Fusion reuses the draft from its ovens to heat water. Across the United States, a race is under way among stores and fast-food restaurants to build environmentally friendly outlets, as a way to curry favor …