Frances Pinter, Central European University Press The goal of the Open Climate Campaign (OCC) is to promote open access to accelerate progress towards solving the climate crisis and preserving global biodiversity. This four-year, $4.5 million project is funded by the Arcadia Fund and Open Society Foundations and managed by Creative Commons, EIFL and SPARC. It promotes internationally the adoption and implementation of strong OA policies, overcoming legal barriers and help funders and environmental organisations make better use of OA. We look at how an issue-based OA campaign such as OCC can fit within the broader scientific and scholarly communications issues including the role of libraries.