Given the political atmosphere in the United States, government-based efforts to mitigate climate change have limited prospects. Private sector action, in which non-governmental entities such as private corporations contribute to mitigation efforts, may hold particular promise. Political conservatives may be more willing to support policies reducing carbon emissions that bypass government regulation. Using an online experimental study (N=1,225), reading about private sector action that targets climate mitigation, as compared to public governance approaches (e.g., government regulation or a carbon tax), led to increased support for private sector action and increased support for reducing carbon emissions, particularly among conservatives. This increased support occurred in part because conservatives perceived these approaches to be feasible and effective. Furthermore, the increased support did not lead to deceased support for public governance approaches. We explore the behavior change and policy implications of these findings.