As a UNFCCC accredited Research NGO, CO 2 GeoNet has been deeply involved in bringing the science behind CO 2 storage and the rationale for Carbon dioxide Capture and Storage (CCS) to a wide range of stakeholders (including the general public) before, during and after the COP21 Climate Conference in Paris. Key messages on CO 2 storage, informed by dialogue with numerous stakeholders, are presented here. The overarching conclusion is that collaboration is needed at an EU and a global level to deploy CCS, a viable and flexible technology ready to play an essential role in completing the climate change mitigation portfolio.