Create an eco-audit for the scenario described in the text: 100 blowmolded 1-liter PET bottles, each weighing 40 g when empty, filled with water in France, and transported 550 km to the United Kingdom...

Create an eco-audit for the scenario described in the text: 100 blowmolded 1-liter PET bottles, each weighing 40 g when empty, filled with water in France, and transported 550 km to the United Kingdom by a 14-metric-ton truck. Select virgin PET, assign the manufacturing process to “Polymer molding,” and select “Recycle” from the end-of-life options. Compare the output bar charts with those of Figure 7.2 to check that everything is entered correctly.

(a) What is the material contribution to the CO₂
footprint of the life cycle?

(b) Change the end-of-life choice to “Combust.” How much CO₂
is released to the atmosphere by this end-of-life choice?

(c) If the filled PET bottles are transported by short-haul air transport rather than a 14-metric-ton truck, how much more carbon is released to the atmosphere?

(d) Change the material of the bottles from PET to soda glass, each bottle now weighing 430 grams instead of 40 grams. What is now the material contribution to the CO₂
footprint of the life cycle?