Farnoosh Nahavandian - Assistant Professor, Department of Extension, Communication and Rural Development, Faculty of Agriculture, University of Zanjan, Zanjan,
Amir Naeimi - Department of Extension, Communication and Rural Development, Faculty of Agriculture, University of Zanjan, Zanjan, Iran.
Behzad Ranjbar - Department of Extension, Communication and Rural Development, Faculty of Agriculture, University of Zanjan, Zanjan, Iran.

Environmental crises are among the most important problems and concerns in the ۲۱st century. Many researchers and experts believe that by encouraging the pro-environmental behavior, these problems can be reduced and it requires increasing the human-environmental knowledge. Therefore, this study aimed to analyze the effects of environmental knowledge on students' pro-environmental behavior. This research is a descriptive and correlational study. The statistical population consisted of all agricultural students studying at the University of Zanjan (N= ۱,۱۲۷). The sample size was calculated using Krejcie and Morgan's sampling table (n= ۲۹۰), and the subjects were surveyed using a proportional stratified random sampling method.  In the statistical process of data analysis, Structural Equation Modelling (SEM) with AMOS ver. ۲۴.۰ software was used to test the research hypotheses. The results indicated that students’ systematic knowledge had a positive and significant effect on students' pro-environmental behavior. Also, the findings indicated that action-related and effective knowledge had no significant effect on students' environmental behavior. Therefore, the systematic knowledge is, directly and indirectly, a good determinant for the environmental behaviors that should be taken into consideration to improve the students' environmental behaviors.

Action-related knowledge, Effective knowledge, Pro-environmental behavior, Systematic knowledge.