set by the organisation. In contrast, we expect that green work
climate perceptions of co-workers, which reflect the descriptive
norms of the workplace, will mediate the relationship between the
perceived presence of an organisational sustainability policy and
proactive EGB. Injunctive norms should have less salience when
employees are not engaged in tasks set by the organisation. In these
situations, the descriptive norms of what is typically observed of
co-workers should be dominant and influence more discretionary
types of EGB.
Hypothesis 2. The relationship between the perceived presence