The present contribution focuses upon a description of tried and tested intervention forms from the field of environmental psychology. The overview gives environmental psychologists an introduction to the conception and planning-of environmental campaigns which aim to cause behavioral change. Others, such as natural scientists and technologists, will find a useful presentation of the methods and proceedings within environmental psychological research. We show how environmental psychologists reach reliable evaluations of the effectiveness of various forms of intervention. First, some widespread but, in our opinion, problematic hypotheses on how behavioral, change may be induced are outlined. Following the description of intervention forms, we show the extent to which intervention forms may be combined with forms of diffusion. Forms of diffusion are presented in brief. Finally, the difficulties of applying scientific knowledge to the world of environmental practice are discussed.