Carrefour, the leading French supermarket chain, is planning to open up to 18 local stores under the Potager City banner by the end of the autumn, according to a report in LSA. An addition to the firm’s Carrefour Proximite portfolio of convenience stores, Potager City aims to cater to the essential food needs of city-dwellers with a range of high-quality fresh produce, and is in addition to to the range of fruit …