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One of the outcomes of the survey shows that, according to the experts' survey participants, Environmental Product Declarations are of main interest to make LCAs transparent. Moreover, the paper investigates the perception of one of the most broadly known eco-labels in Germany, the Blue Angel ...
The ratings of these scales could be unipolar (1 to 7) or bi-polar (−3 to + 3). The ones chosen over the years have varied and as Ajzen (1991) puts it, "there is nothing in the theory, however, to inform us whether responses to these scales should be scored in a unipolar ...