The forest domain is only about 1% of Niger's surface. Roundwood production was estimated at 8,216,000 cu m (290 million cu ft) in 2000, 95% for fuel. Small amounts of gum arabic are extracted from acacia trees. Some tree planting has been undertaken, mainly with acacia species, but deforestation remains a serious problem. About 1,328 hectares (3,281 acres) were reforested annually during 1990–2000 and hundreds of thousands of trees have been planted, but these are highly vulnerable to drought.