There are no commercially exploitable woodlands; existing growths are too inaccessible for profitable development, although they are used locally for fuel and building. Erosion and cutting (due to farming and stock raising) have almost entirely eliminated Rwanda's original forests. Remaining growths are concentrated along the top of the Nile-Zaire divide and on the volcanic mountains of the northwest. There are scattered savanna woodlands in the eastern prefectures. Forests cover an estimated 307,000 hectares (759,000 acres) Roundwood removals came to an estimated 7,836,000 cu m (2.77 billion cu ft) in 2000, 96% for fuel.