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Wood is a major source of renewable heat energy, and burnt efficiently, it produces virtually no smoke and no acid rain. |
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Wood is a solid material derived from woody plants, notably trees but also shrubs |
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Wood is composed of fibers of cellulose (40%–50%) and hemicellulose (15%–25%) held together by lignin (15%–30%) |
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more information: |
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Wood |
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