Cascading use is the efficient utilization of resources by using residues and recycled materials for material use to extend total biomass availability within a given system. From a technical perspective the cascading use of wood takes place when wood is processed into a cradle In a single stage cascade, the wood is processed into a product and this product is used once more for energy purposes. In a multi-stage cascade, the wood is processed into a product and this product is used at least once more in material form before disposal or recovery for energy purposes.