“…Besides values, environmental self-identity appeared to be influenced by previous environmental actions: the environmental self-identity is stronger among those who did engage in pro-environmental actions, and weaker among those who did engage in environmentally-harmful actions (Van der Werff et al, 2013a). Interestingly, experimental studies showed that the environmental self-identity could be strengthened by reminding people of previous pro-environmental actions, especially when these previous actions clearly signal that one is a pro-environmental person (e.g., when the behaviour is unique or difficult), while it was weakened when people were reminded of previous environmentally-harmful actions (Cornelissen, Dewitte, Warlop, & Yzerbyt, 2007;Cornelissen, Warlop, & Dewitte, 2008;Van der Werff et al, 2013a. However, in such cases values still predict the environmental self-identity, suggesting that environmental self-identity can be changed to some extent only.…”