FILE PHOTO: A farmer carries collected gum arabic from an Acacia tree in the western Sudanese town of El-Nahud that lies in the main farming state of North Kordofan December 18, 2012. REUTERS/Mohamed Nureldin Abdallah/File Photo
FILE PHOTO: A farmer carries collected gum arabic from an Acacia tree in the western Sudanese town of El-Nahud that lies in the main farming state of North Kordofan December 18, 2012. REUTERS/Mohamed Nureldin Abdallah/File Photo