According to standard 14042 of the International Standard
Organisation (ISO),li fe cycle impact assessment
(LCIA) consists of two mandatory elements,cl assification
and characterisation,an d a series of optional elements,
normalisation,gr ouping, and weighting [13]. These elements
and the sequence of events are described in Fig. 3. A
fourth phase,in terpretation,is to evaluate the study in
order to derive recommendations and conclusions