ANNOTATION: The pulp raw material shortage in 1973 and 1974 provided incentives for using whole tree chips at a number of pulp mills in the United States. Since 1974 pulp raw materials supplies have returned to more acceptable levels. As a result, whole tree chips are being used only on a limited basis. However, energy shortages during recent years have provided incentives for the utilization of whole tree chips. Currently, projects are underway in Montana, Idaho and Washington which will increase the demand for waste fuel.