Individual behavior is one of the major sources of environmental problems. Besides situational barriers, mainly psychological obstacles keep people from behaving ecologically in a strong and persistent manner. This is where environmental education is in great demand. Knowledge is commonly seen by environmental education as a necessary precondition for a person's ecological behavior. Not surprisingly, the majority of educational interventions rely on the dissemination of information. However, in order to make most efficient use of information, it might be necessary to identify those types of knowledge that have the biggest influence on our behavior. Environmental knowledge should therefore not be treated as a homogeneous unit, but rather as consisting of different types of knowledge. Consequently, knowledge can have various impacts on ecological behavior, which can be explored separately.