As environmental quality strongly depends on human behaviour patterns, more attentions have been paid to understand and promote pro-environmental behaviour in the tourism sector with sustainable development. This thesis focuses on online Eco-label accommodation booking as a tourist pro-environmental behavior to study the effects of environmental self-identity and personal norms on prospective tourists’ pro-environmental behaviour. Based on a literature review on the contribution and potential of environmental social psychology for understanding and promoting pro-environmental behaviour, a conceptual framework was proposed, comprising: environmental self-identity, general personal norm and specific personal norm, and online Eco-label accommodation booking, which proposed 7 hypotheses. These hypotheses were tested by a quantitative online questionnaire to collect data and data analysis using a correlationand regression design. The results indicated that all the environmental self-identity and personal norms were positively related to online Eco-label accommodation booking. The findings demonstrated how environmental self-identity affected the intention of online Eco-label accommodation booking via a moral route and the likelihood of achieving this assumed model, which suggested that strengthening environmental self-identity could be an effective way to promotepro-environmental actions. The importance and potential ofenvironmental social psychology for understanding and promotingpro-environmental behaviour in the tourism sector have been discussed.

The environmental and climate-related sustainability challenges facing the world today are complex, accelerating and urgent, and they call for change from multiple stake­hol­ders. While govern­ments, busi­nes­ses and other insti­tutions hold a high degree of responsibility for initia­ting and enabling the neces­sary change processes towards sustainable practices, so do also individuals and com­munities. Despite inno­va­tive change projects worldwide much remains to be done. However, making changes is difficult for many people, and even more so in situations characterised by uncertainty. In this study the role of future-oriented ima­gination in motivating changes towards sustainable lifestyles was explored through an experimental intervention design. Test group participants were exposed to a guided imagination of a sustainability scenario in the year 2028, followed by a writing assignment allowing them time to en­ga­ge with how they see their own future life. The control group spent the same amount of time listening to a guided present-day reflection and writing about their current everyday life. Pre- and post-intervention, both groups comp­leted lifestyle question­naires. The pre­-­­inter­­vention ques­tion­naire constituted the baseline assessment against which their post-inter­ven­tion questionnaire results (which was asking both groups to record the lifestyle decisions they thought they would be making in the year 2028 on the same behaviours as in the pre-intervention questionnaire) were compared to check for reported degrees of changes. Besides their expected lifestyle changes, their predicted future personal change and degree of pro-environmental self-identity in the year 2028 was measured. The results show that test group participants, who were exposed to the future-oriented imagination, reported a substantially higher degree of future lifestyle changes and future pro-environ­mental self-identity than the control group, as well as predicting a higher degree of future personal change. Future-oriented imagination seems to be a potent pathway for eliciting future-oriented sustainability enga­ge­ment while avoiding some of the risks of negative spillover. This suggests that future-oriented imagination can play an important role in developing motivation for sustainable lifestyle changes, and that it can be a complement to other psychological drivers for pro-environmental behaviours.