Along with the discussion about the predictive ability of the NEP to measure environmental behavior, there have been continuing discussions among researchers in several other issues. One of the major arguments about the scale is the issue of dimensionality [22]. Although the original study of Dunlap and Van Liere [24] treated the scale as a unidimensional factor, there have been many researchers who found the scale to be multidimensional [31], [32], [33], & [34]. In addition, it is important to note that some of the studies that obtained multiple factors out of the NEP using the factor analysis