What is going on with environmental education, which is currently unable to promote pro-environmental behaviors as effectively as it promotes pro-environmental attitudes? A tentative answer is that the environmental attitude-behavior gap observed in some individuals is just one manifestation of their lack of self-control for maintaining consistency in many life spheres. In the absence of prior empirical evidence, intuition suggests that the environmental attitude-behavior gap does not appear isolated but rather interconnected to other individual inconsistencies, while a rational approach suggests that self-control (i.e. capacity to perform consistent actions) plays an important role in explaining the environmental attitude-behavior gap within the framework of the theory of planned behavior. Using data collected in Spain, we found that four individual inconsistencies (concerning fast food, alcoholic beverages, pre-cooked meals, and diet products) made an important contribution to the explanation of the environmental attitude-behavior gap, revealing a remarkable connection between personal and environmental health care. These findings suggest the importance of focusing education efforts on strengthening students' self-control in order to make them more capable of being consistent in all life endeavors.