Rubberwood is a tropical hardwood used to fabricate a wide range of interior and garden furniture, wooden floor coverings, doors and plywood. Rubberwood trees were historically grown for their latex - latex was traditionally harvested for 25 years before the groves were felled and replanted. Rubberwood's high natural starch content makes it susceptible to attack by fungi and wood boring beetles. Pressure-treating rubberwood with colorless, odorless borates - now a standard industry practice - gives rubber trees a second life as building materials for furniture. As a result, rubberwood is one the very few tropical timbers whose continued use is endorsed by the Friends of the Earth and other environmentally concerned organizations.