Transforming whole trees into lumber and wood products or into pulp and paper products requires significant physical, chemical, and some biological processes that are highly energy-intensive. The forest products industries alone account for over 14% of total industry energy demand; however, almost 40% of this energy is generated onsite through the use of biomass byproducts for heat and steam. The technologies used by the lumber and wood products industry differ significantly from those used by the pulp and paper industry. Principal processes in lumber and wood products include debarking, log processing, drying, product fabrication, and finishing. Major pulp and paper processes include pulping and papermaking.