A customer walks next to a box full of Carrefour's new biodegradable bags at a Carrefour supermarket in Madrid

" alt="A customer walks next to a box full of Carrefour's new biodegradable bags at a Carrefour supermarket in Madrid September 1, 2009. The French supermarket chain plans to remove all of its plastic bags from all of its Spanish stores by the end of 2009. To replace the plastic bags they offer customers a biodegradable bag at 0.05 euros ($0.07) or a raffia reusable bag at 0.25 euros ($0.3). REUTERS/Susana Vera (SPAIN SOCIETY BUSINESS ENVIRONMENT )" />