Weyerhaeuser Co started out as Weyerhaeuser Timber Company, incorporated in the state of Washington in January 1900. It is a real estate investment trust. It is a private owner of timberlands. The Company owns or controls nearly seve...n million acres of timberlands, primarily in the U.S., and manage another 14 million acres under long-term licenses in Canada. It manages these timberlands on a sustainable basis in compliance with internationally recognized forestry standards. It is also one of the manufacturers of wood and specialty cellulose fibers products, and develop real estate, primarily as a builder of single-family homes. Its segments include Timberlands, Wood Products, Cellulose Fibers and Real Estate. The Company grows and harvests trees, manufactures and sells products made from them, build ...and sell homes and develop land. Its Timberlands segment grows and harvests trees for use as lumber, other wood and building products and pulp and paper, exports logs to other countries where they are made into products, plants seedlings to reforest harvested areas using the most effective regeneration method for the site and species, monitors and cares for the new trees as they grow to maturity, and seeks to sustain and maximize the timber supply from its forestlands while keeping the health of its environment a key priority. Its Wood Products segment provides a family of high-quality softwood lumber, engineered lumber, structural panels and other specialty products to the residential, multi-family and light commercial markets, sells its products and services primarily through its own sales organizations and distribution facilities as well as building materials that it purchases from other manufacturers, sells certain products into the repair and remodel market through the wood preserving and home-improvement warehouse channels, and exports its softwood lumber, oriented strand board (OSB) and engineered building materials to Asia. Its Cellulose Fibers segment provides cellulose fibers for absorbent products in markets around the world, works closely with its customers to develop unique or specialized applications, manufactures liquid packaging board used primarily for the production of containers for liquid products, and is largely energy self sufficient, with 83 percent of its energy derived from black liquor produced at the mills and biomass. Its Real Estate business segment is engaged in constructing single-family housing and developing residential lots for its use and for sale. The Company’s products face competition from substitutes for wood and wood-fiber products. In real estate development, its competitors include numerous regional and national firms. In the United States, regulations established by federal, state and local governments or agencies to protect water quality and wetlands could affect future harvests and forest management practices on some of its timberlands.