Current situation of CO_2 geological storage and its perspectives

摘要

As no wait is allowed for global warming, there is a demand for speedy practical implementation of measures that cut the emissions of carbon dioxide (CO_2) which has quantitatively the most significant greenhouse effect. Carbon dioxide capture and storage (CCS) technology which captures and stores CO_2 emitted into the atmosphere from large scale emission sources is an important technology of atmospheric CO_2 reduction. For the final step of CCS, CO_2 storage in the water-filled geological strata (aquifer), or CO_2 geological storage, is drawing attention.