The CCS needs to be examined more closely, particularly in view of a very recent paper with the title "Carbon capture and storage (CCS): the way forward," published in the journal Energy & Environmental Science, available for free at https://pubs.rsc.org/en/content/articlepdf/2018/ee/c7ee02342a
This 114-page report, authored by no less than 30 people from 20 or so research institutes, university departments, and companies also makes proclamations on such things as "key negative emission technologies (NETs)", "bioenergy with CCS (BECCS)," and "direct [CO2] air capture (DAC)." Lead author is Dr. Mai Bui of the Imperial College London, UK.