Some studies suggest that forests and trees can provide around 20 percent of income for rural households in developing countries, and that income from forests is proportionately more important for the livelihoods of the poorest households. The proportion of people relying on woodfuel varies, from 63 percent in Africa to 38 percent in Asia and 16 percent in Latin America. Globally, 840 million people collect woodfuel and charcoal for their own use.