Carbon capture and storage (CCS) doesn’t to decrease the negative environmental effects of coal power.
Researchers from National Technical University of Athens and Technische Universiat Berlin conducted analysis of the life cycle impact of coal and natural gas plants. They aggregated all individually calculated environmental impacts of each step of energy production in plants with and without a CCS program into a single Environmental impact of electricity number for each.
The large energy requirements needed for stripping flue gas, transporting and storing carbon dioxide and the processing of waste reduce efficiency signifficantly. It was found that the best way to decrease carbon emissions was to decrease fuel usage.
Read more at American Chemical Society