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{{#invoke:Hatnote|hatnote}} {{#invoke:Hatnote|hatnote}} {{#invoke:Pp-move-indef|main}} {{ safesubst:#invoke:Unsubst||$N=Use mdy dates |date=__DATE__ |$B= }} {{ safesubst:#invoke:Unsubst||$N=Use American English |date=__DATE__ |$B= }}

Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants.

It has been used for thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees,<ref>{{#invoke:citation/CS1|citation |CitationClass=book }}</ref> or it is defined more broadly to include the same type of tissue elsewhere such as in the roots of trees or shrubs.{{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[citation needed] }} In a living tree it performs a support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients between the leaves, other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or wood chips or fiber.

The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were for furniture and building construction.<ref name=Ullmann>Horst H. Nimz, Uwe Schmitt, Eckart Schwab, Otto Wittmann, Franz Wolf "Wood" in Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim. doi:10.1002/14356007.a28_305</ref>


Wood sections
Intro  History  Physical properties  Hard and soft woods  Chemistry of wood  Uses  Bacterial degradation  See also  References  Footnotes  

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{{#invoke:Hatnote|hatnote}} {{#invoke:Hatnote|hatnote}} {{#invoke:Pp-move-indef|main}} {{ safesubst:#invoke:Unsubst||$N=Use mdy dates |date=__DATE__ |$B= }} {{ safesubst:#invoke:Unsubst||$N=Use American English |date=__DATE__ |$B= }}

Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants.

It has been used for thousands of years for both fuel and as a construction material. It is an organic material, a natural composite of cellulose fibers (which are strong in tension) embedded in a matrix of lignin which resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees,<ref>{{#invoke:citation/CS1|citation |CitationClass=book }}</ref> or it is defined more broadly to include the same type of tissue elsewhere such as in the roots of trees or shrubs.{{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[citation needed] }} In a living tree it performs a support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients between the leaves, other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or wood chips or fiber.

The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were for furniture and building construction.<ref name=Ullmann>Horst H. Nimz, Uwe Schmitt, Eckart Schwab, Otto Wittmann, Franz Wolf "Wood" in Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim. doi:10.1002/14356007.a28_305</ref>


Wood sections
Intro  History  Physical properties  Hard and soft woods  Chemistry of wood  Uses  Bacterial degradation  See also  References  Footnotes  

PREVIOUS: IntroNEXT: History
<<>>