Logging is believed to be the second largest cause of deforestation. Timber companies cut down huge trees such as mahogany and teak and sell them to other countries to make furniture. Smaller trees are often used for the production of charcoal. Vast areas of rainforest are cut in one go (clear felling) and the most valuable trees are selected for timber, leaving the others for wood chipping. The roads that are created in order to cut and remove the timber often lead to further damage: see the effect of forest roads under "Oil Companies".