a. A range of office furniture includes a chunky hardwood table weighing (18 mathrm{~kg}) and a much

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a. A range of office furniture includes a chunky hardwood table weighing \(18 \mathrm{~kg}\) and a much lighter table with a \(3.0 \mathrm{~kg}\) virgin aluminium frame and a \(3.0 \mathrm{~kg}\) glass top. Which of the two tables has the lower embodied energy? Use data from the data sheets of Appendix A to find out.

b. If the alumina-glass table is made from recycled aluminium with an embodied energy of \(30 \mathrm{MJ} / \mathrm{kg}\), does the conclusion change?

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