This study of 4077 consumers examines the impact of gender and gender identity on environmental attitudes and behaviors. We find that, compared to gender, gender identity is consistently a better predictor of the extent to which consumers form pro-environment attitudes and perform pro-environment behaviors. Androgynous individuals-those who have both feminine and masculine traits-were of particular interest in this study. Androgynous consumers are the most likely of all gender identity groups to exhibit strong pro-environment attitudes, subscribe to a more multi-dimensional set of attitudes, and enact pro-environment behaviors. Further, we identify two unique dimensions of environmental attitudes-Humans Rule and Do not Fool with Nature-that function as mediators of the influence of androgyny on pro-environment behaviors.