Since 2004, research at the Ketzin pilot site in Germany contributes to the understanding of the geological storage of carbon dioxide (CO 2 ). For the Ketzin project public outreach has been a key element from the very beginning. Involvement of the local public, scientists, stakeholders and competent authorities allowed for the consideration of their different interests. The dissemination of up-to-date and factual information along the entire chain of activities is a central component of the project. The work presented here summarizes the activities and the experiences of the public outreach accompanying the research on CO 2 storage at the Ketzin pilot site.