SELECTION OF A METHOD TO PRODUCE ACTIVATED CHARCOAL USING FOUR FOREST SPECIES. This investigation was conducted in the Coal and of Forest Products Laboratory of the Universidad Nacional de Colombia, Sede Medellin. It was oriented towards the selection of a method to obtain activated carbon form the following forest species; pino patula (Pinus patula), chingale (Jacaranda copaia), pino tecunumani (Pinus tecunumanii) and roble (Quercus humboldtii). The wood of each was characterized determining their physical properties of density and contraction.