“…Along with its predictive ability, the TBP is also known for its flexible structure. In the field of pro-environmental behaviour, to enhance its explanatory power and predictive ability in a specific context, authors extended the theory by introducing additional variables, such as environmental concern, environmental knowledge, and moral norms, along with the original three predictors of attitude, subjective norm, and perceived behavioural control (Yadav & Pathak, 2016;Dangelico et al, 2020;Siraj et al, 2022). Its flexible structure has further been applied with different variables, where new variables like environmental knowledge, eco-label knowledge, environmental concern, trust, norms, etc have been used along with few but not all the original predictors (Taufique et al, 2017;Dangelico et al, 2021;Tian et al, 2021).…”