Forests and woodlands covered 121,000 hectares (299,000 acres) in 2000, representing only 6% of the total land area. Virgin forests once covered 90% of El Salvador. Almost all of the lumber used in building and in other Salvadoran industries must be imported, mainly coming from neighboring Guatemala, Honduras, and Nicaragua. Roundwood production in 2000 was4.7 million cu m (166 million cu ft). Forest products include dye woods and lumber, such as mahogany, walnut, and cedar, for furniture and cabinet work. El Salvador is the world's main source of balsam, a medicinal gum; between Acajutla and La Libertad in the southwest is the so-called Balsam Coast, which supports a species of balsam tree unique to El Salvador.