The Swiss Energy Strategy foresees CO2 capture and underground storage, possibly abroad, among the necessary measures to reach the net zero target by 2050. DemoUpCARMA, the partner project of DemoUpStorage, explores as one pathway to negative emissions the transport and storage of Swiss biogenic CO2 in Islandic Basalt as well as this pathway’s potential for upscaling. Since a safe and permanent storage of the Swiss CO2 is an indispensable requirement, DemoUpStorage takes the lead in closely monitoring the injection and the dispersion of the Swiss CO2 in the Islandic underground at a new site. For the injection, a novel technique is used, where the CO2 is dissolved in sea instead of fresh water. The findings of DemoUpStorage will further advance the Swiss Roadmap for geological CO2 storage through knowledge acquisition and transfer, as well as capacity building.