A sizable minority of people doubt that climate change is primarily caused by human activity ("attribution skeptics"). Consequently, it is important to examine the psychological drivers of pro-environmental intentions among attribution skeptics and the extent to which they are more or less influenced by traditional climate change messages. Study 1 (N = 4,345) examined the psychological correlates of motivation to engage in pro-environmental behaviors among people at various points of the spectrum of belief in anthropogenic climate change. As expected, motivation to engage in pro-environmental behaviors is related to risk perceptions and concern about the consequences of climate change. Interestingly, however, these links were stronger the more participants reported being skeptical that climate change is anthropogenic. This suggests that climate change interventions might be especially successful in changing pro-environmental motivation among attribution skeptics, a prediction supported by an experimental intervention (Study 2; N = 600). Theoretical and applied implications are discussed.