Considered as a resource, woody biomass is most often identified with energy production, mulch, or soil amendments. Specific sources of woody biomass include: otherwise non-merchantable trees, logging residues in the form of tree tops and branches, wildfire fuel-reduction thinnings, salvage harvests, sawmill residues (including sawdust and board trimmings), residues from furniture and other wood manufacturing facilities, urban tree maintenance (removals, pruning, thinning, etc.), diverted woody materials from landfills (post-consumer waste and construction and demolition debris), natural forests, and trees planted specifically for energy production (plantations).