This article develops a conceptual framework for advancing theories of envi
ronmentally significant individual behavior and reports on the attempts of
the author's research group and others to develop such a theory. It discuss
es definitions of environmentally significant behavior; classifies the beha
viors and their causes; assesses theories of environmentalism, focusing esp
ecially? on value-belief-norm theory: evaluates the relationship between en
vironmental concern and behavior; and summarizes evidence on the factors th
at determine environmentally? significant behaviors and that carl effective
? alter them. The article concludes by presenting some major propositions s
upported by available research and some principles for guiding future resea
rch and informing the design of behavioral programs for environmental prote
ction,