Not all pro-environmental behaviors are created equal—some are vastly more effective at mitigating climate change than others. Do people judge more effective behaviors as proportionally morally superior? This question is important because moral motivations are powerful drivers of individual and collective action. Four studies (N = 5,334; three pre-registered) reveal a robust morality-effectiveness disconnect: Behaviors that rank better on objective climate mitigation potential rank worse on perceived morality. This disconnect is mediated by stronger personal support for less effective behaviors, and is weaker among individuals more interested in learning about environmental impacts. Study 3, a five-country experiment, reveals that explicitly labeling behaviors' impact reduces the disconnect by 68%, but does not eliminate it. Study 4 demonstrates that providing detailed information reverses the disconnect, leading people to judge more effective behaviors as proportionally more moral and increasing policy support relative to less effective behaviors. Theoretical and practical implications are discussed.
Martuza et al. (2025) studied this question.