Some 80 percent of population of the developing world uses forest food
"Several million households world-wide depend heavily on NWFP (Non-wood forest products) for subsistence and/or income. Some 80 percent of the population of the developing world use NWFP for health and nutritional needs." Non-wood forest products, FAO. Definition of NWFP: "NWFP are products of biological origin other than wood derived from forests, other wooded land and trees outside forests. NWFP may be gathered from the wild, or produced in forest plantations, agroforestry schemes and from trees outside forests."
"Non-wood forest products," FAO, 2013, http://www.fao.org/forestry/nwfp/6388/en/ [verified 4/15/14]