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measured as kilograms of equivalent CO , and acidification (acid po-
2
tential, AP) measured as kilograms of equivalent SO .
2
Determine for each alternative the value of these parameters related to en-
vironmental impact caused by the use of 1 kg of polymer and determine
which of these kinds of plastics would be better used from an environ-
mental point of view. The necessary ELs and impact factor data are giv-
en in the following table.

16-t Truck
EL Unit PP (1 kg) PVC (1 kg) Van (tkm) Train (tkm)
(tkm)
Oil kg 1.82 1.07 4.71 × 10 –1 1,06 × 10 –1 8.73 × 10 –3
kg 3.11 3.22 1.54 3.46 ×10 –1 5.41 × 10 –2
CO 2
kg 2.22 × 10 –2 1.92 × 10 –2 3.39 × 10 –3 7.3 × 10 –4 2.15 × 10 –4
SO 2
kg 4.44 × 10 –2 6.70 × 10 –3 8.72 × 10 –2 3.52 × 10 –3 2.89 × 10 –4
NO 2
kg 1.07 × 10 –2 8.05 × 10 –3 2.61 × 10 –3 5.34 × 0 –4 1.06 × 10 –4
CH 4
HCl kg 1.65 × 10 –4 3.26 × 10 –4 3.48 × 10 –5 6.05 × 0 –6 5.43 × 10 –3
tkm equivalent to a mass of 1 t (1000 kg) transported 1 km.
Environmental impact factors:
GWP AP
Component Factor Component Factor
1 1
CO 2 SO x
62 0.7
CH 4 NO x
HCl 0.88

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