A farmer collects 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. Business is booming in the western Sudanese town of El-Nahud thanks to rising global demand for gum arabic, a natural and edible gum taken from acacia trees growing in the area. Picture taken December 18, 2012. To match Feature SUDAN-GUMARABIC/ REUTERS/Mohamed Nureldin Abdallah (SUDAN - Tags: AGRICULTURE BUSINESS)