“…; and external factors such as institutional, economic, social, and cultural factors. The second type of research, represented by numerous works, tested the impact of one or more specific variables on a well-defined pro-environmental behavior and in a particular context, using qualitative and quasiexperimental methods (Bonaiuto, Carrus, Martorella & Bonnes, 2002;Chhokar, Dua, Taylor, Boyes & Stanisstreet, 2011;Cialdini, Reno & Kallgren, 1990;Corraliza & Berenguer, 2000;Hadjichambis, Paraskeva-Hadjichambi, Ioannou, In general, we can say that the variables influencing the pro-environmental behavior, stated by all the researchers above, can be classified according to their degree of influence, direct or indirect, in two main categories, some of which lead to the others. That is, some variables are less correlated with behaviors and enter into the training or education phase.…”