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\nCarbon dioxide capture and geological storage are not new technologies: CO2 capture and separation has been used in industry for decades, and CO2 injection has been used since the 1970s for enhanced oil recovery. However, a number of obstacles still need to be overcome before they can be deployed on a large scale.\nThis article reviews existing technologies, both mature and under development, and discusses the issues to be addressed: reducing the cost and energy penalty for CO2 capture, pooling infrastructures for transport, demonstrating the feasibility of mass storage, and the outlook for use.\n