## 3 Results
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline
**Material** & **Weight** & **Active** & **Fab/Use Imp.** & **Distance** & **Transport** & **Transport Imp.** & **Waste Treatment** & **Waste Imp.** & **Total Imp.** \\ \hline Steel & \(6.70\times 10^{6}\) & YES & \(6.42\times 10^{6}\) & 10 & Lorry 16–32 t & \(1.10\times 10^{-3}\) & Landfill & \(7.73\times 10^{-3}\) & \(6.43\times 10^{6}\) \\ Aluminium & \(5.60\times 10^{10}\) & YES & \(8.45\times 10^{6}\) & 10 & Lorry 16–32 t & \(9.22\times 10^{-4}\) & Landfill & \(1.22\times 10^{-2}\) & \(8.46\times 10^{6}\) \\ PVC & \(3.00\times 10^{-1}\) & YES & \(6.96\times 10^{-2}\) & 10 & Lorry 16–32 t & \(4.94\times 10^{-5}\) & Landfill & \(1.94\times 10^{-2}\) & \(8.91\times 10^{-2}\) \\ Chipboard Wood & \(3.15\times 10^{1}\) & YES & \(3.35\times 10^{6}\) & 10 & Lorry 16–32 t & \(5.19\times 10^{-3}\) & Landfill & \(2.02\times 10^{-2}\) & \(3.55\times 10^{6}\) \\ Wood & \(3.60\times 10^{1}\) & NO & \(0.00\times 10^{6}\) & 10 & Lorry 16–32 t & \(0.00\times 10^{6}\) & Landfill & \(0.00\times 10^{6}\) & \(0.00\times 10^{6}\) \\ Paperboard & \(3.00\times 10^{6}\) & YES & \(3.74\times 10^{-1}\) & 10 & Lorry 16–32 t & \(4.94\times 10^{-4}\) & Incineration & \(9.36\times 10^{-2}\) & \(4.68\times 10^{-1}\) \\ CONVENTIONAL DESK & & & & & & & & & \(1.90\times 10^{1}\) \\ PRICE: \(\copyright\)6149.35 & & & & & & & & & & \\ \hline \end{tabular}
\end{table} 
Table 8: Results of conventional desk scenario. If the option of using wood instead of chipboard is considered, though including a local supplier, along with the scenario of possible recycling this wood at the end of its useful life (see Table 10 and Figure 3), the results vary significantly. The environmental impact is thus reduced by \(2.4\times 10^{0}\) pt., as the total impact of the desk is \(1.66\times 10^{1}\) pt. If instead of wood, a cheaper version using chipboard is chosen and the option of final recycling is also considered (see Table 11 and Figure 4), the impact is also reduced compared to the base case (\(1.21\times 10^{0}\) pt. ), but it does not reach the values of the case with wood and recycling. The total impact of the desk would be \(1.78\times 10^{1}\) pt. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Material** & **Weight** & **Active** & **Fab/Us Imp.** & **Distance** & **Transport Imp.** & **Waste Treatment** & **Waste Imp.** & **Total Imp.** \\ \hline Steel & \(6.70\times 10^{0}\) & YES & \(6.42\times 10^{0}\) & 10 & Lorry 16-32 t & \(1.10\times 10^{-3}\) & Landfill & \(7.73\times 10^{-3}\) & \(6.43\times 10^{0}\) \\ Aluminum & \(5.60\times 10^{0}\) & YES & \(8.45\times 10^{0}\) & 10 & Lorry 16-32 t & \(9.22\times 10^{-4}\) & Landfill & \(1.22\times 10^{-2}\) & \(8.46\times 10^{0}\) \\ PVC & \(3.00\times 10^{-1}\) & YES & \(6.96\times 10^{-2}\) & 10 & Lorry 16-32 t & \(9.22\times 10^{-4}\) & Landfill & \(1.94\times 10^{-2}\) & \(8.91\times 10^{-2}\) \\ Chipboard Wood & \(3.15\times 10^{1}\) & NO & \(0.00\times 10^{0}\) & 10 & Lorry 16-32 t & \(0.00\times 10^{0}\) & Landfill & \(0.00\times 10^{0}\) & \(0.00\times 10^{0}\) \\ Wood & \(3.60\times 10^{1}\) & YES & \(4.19\times 10^{0}\) & 10 & Lorry 16-32 t & \(5.93\times 10^{-3}\) & Recycling & \(-3.06\times 10^{0}\) & \(1.13\times 10^{0}\) \\ Paperboard & \(3.00\times 10^{0}\) & YES & \(3.74\times 10^{-1}\) & 10 & Lorry 16-32 t & \(4.94\times 10^{-4}\) & Incineration & \(9.36\times 10^{-2}\) & \(4.68\times 10^{-1}\) \\ WOOD DESK + RECYCLING & & & & & & & \(1.66\times 10^{1}\) \\ PRICE: E170.21 & & & & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Results of wood desk + recycling scenario. Figure 2: Environmental impact contribution for American wood desk scenario. If, in addition to choosing wood and facilitating the option of its final recycling, the amount of material needed to manufacture the desk is reduced by 30% in wood and 20% in metal, the environmental impact would decrease by 5.7 \(\times\) 10\({}^{9}\) pt. The total impact of this design would be 1.33 \(\times\) 10\({}^{1}\) pt. (see Table 12 and Figure 5).