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Enhanced carbon sequestration is one means to mitigate climate change. Rangelands are arid and semi-arid lands, typified by relatively low and variable levels of net primary productivity, where carbon sequestration might be increased via alterations in land management. Rangelands are vast in size and dominate the land area in the western US and worldwide. It has been estimated that privately owned rangelands in the US could sequester an additional 60 million tons of carbon annually, roughly equal to five percent of the US annual CO2 emissions. Ranchers are the target population that could implement changes in rangeland management to promote carbon sequestration, but little is known about how they might receive such programs. Therefore, for Utah, we conducted a combined mail and telephone survey of 495 randomly selected ranchers to assess their knowledge of and attitude toward carbon sequestration, possible benefits of carbon sequestration as perceived by ranchers, and factors influencing their likelihood of participating in carbon sequestration programs. Overall, despite that 70 percent of respondents had little or no self-reported knowledge about carbon sequestration, 63 percent had negative views about it. Ranchers reporting the most knowledge also tended to have the most negative attitudes. The least important benefit that might accrue to ranchers from carbon sequestration was seen as climate change mitigation, while the most important benefit was improved land stewardship. Only four percent of respondents indicated an unconditional willingness to participate in carbon sequestration programs, but 71 percent could be interested depending on new information received. Before carbon sequestration programs are developed for rangelands, further research is needed to clarify why more knowledge of carbon sequestration can lead to greater skepticism of relevant programs. We respect this finding, as it may be based on well-founded rancher concerns such as technical or administrative efficacy. If such concerns can be overcome, extension efforts should be tailored to emphasize the ecological merits of carbon sequestration for rangeland management, which will facilitate the ability of ranchers to achieve their personal goals. [Copyright &y& Elsevier]