Carrefour converts urban spaces into green spaces   Paris, 2017-May-01 — /EPR Retail News/ — For the official inauguration of the vegetable garden on the roof of the Villiers-en-Bière hypermarket in Seine-et-Marne, Carrefour is sharing its ideas for introducing short distribution channels at its stores. Stores which are becoming production sites Villiers-en-Bière vegetable garden: over a 1200 m² surface area,…