"Potential Gigatons of CO2 Storage Found in Extinct Offshore Volcano"

An extinct volcano off the coast of Portugal could store 1.2-8.6 gigatons of carbon dioxide, equivalent to 24-125 years of the country's industrial emissions, according to a new study. The process of storing carbon dioxide in an extinct volcano relies on "in situ mineral carbonation," where carbon dioxide reacts with elements in certain types of rocks to produce new minerals that safely and permanently store the carbon dioxide. The researchers targeted the offshore volcano due to its ideal architecture for carbon injection and storage, the right type of rocks for the reactions involved, and its location not too close to large populations but not too far.