A type of volcanic rock may be the key to long-term carbon sequestration, research shows, as the surface of such rock reacts with carbon dioxide to form a mineral. Storing the CO2 in reactive mafic rock formations deep underground means "you are making rocks out of [the CO2]. It’s not sitting there as a high-pressure fluid" posing a potential earthquake threat, said David Bercovici, a professor of geology and geophysics at Yale University who participated in the research.

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