The Kuznets Environmental Curve (EKC) hypothesis shows that there is an inverse relationship between environmental pollution and per capita income. This study examines the impact of economic growth on environmental quality using meta-analysis in MENA countries. To do this, all full-text articles were used without any time and places limited. In the beginning, 909 Persian and English full articles were examined. Finally, 13 studies with 84 regression models were investigated. Data were analyzed using STATA software version 14.1 and CMA. The results show that the effect size of economic growth on environmental quality is approximately 0.22. The (EKC) hypothesis is confirmed. By improving economic growth, the quality of the environment improves. Also, the effect size of energy consumption and urbanization is 1.4 and 0.34 respectively, which, according to Kuhn's interpretation, indicates the effect size at the upper and lower levels, respectively. Population variables, literacy rate, degree of trade openness and fixed foreign investment were also other variables that affect the quality of the environment.
