The inventory analysis, according to ISO 14040 requirements,
includes the collection and classification of data and the quantification
of the flows in the entrance and exit portions of the product
system. The flows include the use of resources and emissions in air,
water and the ground associated with the system [19].
The approach used in this study to generate the life cycle
inventory is the input/output approach [29] and so all of the inputs
and outputs of the processes were analyzed. In particular, unlike
the ISO 14040, however, the inventory data were collected only
within the ‘‘Climate Change’’ impact category.
We considered the collection of the data (input/output) of
processes as follows: