The study focuses on developing a model of pro-environmental behaviour. Another pressing matter is determining whether pro-environmental behaviour is voluntary or non-voluntary. This study examines the impact of social pressure and pro-environmental self-identity on such behaviour, with pro-environmental views acting as a mediator variable. The study employed a positivist paradigm and used quantitative techniques in the form of an online survey. The research design involved a diverse group of participants, including adolescents and adults from Indonesia. A total of 653 Indonesian respondents were selected from various islands in Indonesia. Using Smart PLS to analyse the data, this study demonstrates that social pressure and pro-environmental self-identity substantially and favourably impact pro-environmental attitudes, based on empirical evidence. Recent research shows that pro-environmental activity in Indonesian society tends to be voluntary rather than compulsory. This study provides empirical evidence that the combination of social influence and self-identity theories can effectively explain voluntary pro-environmental behaviour.
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