LAUSR

Abstract What motivates people to participate in which forms of environmental activism? To address this question, we revise empirical models examining environmental activism by disaggregating the outcome variable of movement participation and dichotomizing two key motivational factors. Using repeated cross-sectional data from the US General Social Survey of 2000 and 2010, this study conducts logistic regression of four forms of participation on perceived severity and sense of efficacy, while accounting for biographical availability and political engagement. Results from regression analysis show that vocabularies of motive have substantial impacts on an individual’s likelihood of: (1) signing a petition; (2) giving money; (3) joining a group; and (4) joining a protest or demonstration. Their effects are large enough to override the noticeable impacts of liberalism and education. This study also finds that the level of participation in the movement across all forms has decreased between 2000 and 2010. These findings direct our attention to the limited capacity of the public sphere to accommodate the environmental movement during the last decade, as well as to potential changes in environmental activism in the coming decades that may mobilize those previously less likely to participate.