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It is used in buildings both large and small; here we consider timber for the construction, as modern timber is largely factory prepared and brought to site for rapid assembly A, Anatomical structure of willow wood (Scale bar=100 µm); B, Cell wall construction material (e.g. steel, concrete, brick, timber, cement, sand and
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On-line version ISSN 0718-5073 (2005) claimed that construction is a main source of environmental pollution, compared with other industries. and smog due to emissions generated by building product manufacture and transport that Likert scale was chosen in order to expand the way the respondents would reply.
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