Since 1971 CRS has been one of the largest nongovernmental humanitarian agencies working in Sudan, primarily across the southern regions. In southern Sudan, CRS provides support for agriculture, education, emergency relief, health, business enterprise, capacity building and peacebuilding. In western Sudan (Darfur), CRS provides emergency relief in the form of shelter, food, water, relief supplies, sanitation and education. Web Site. electronic | Electronic (Form).