CO2 emissions to cement via calcium carbonate

what to do with co2 emissions from coal fired power plants: “process that takes CO2 emissions from a coal- or gas-fired power plant and sprays seawater into it and naturally converts most of the CO2 into calcium carbonate, which is then spray-dried into cement or shaped into little pellets that can be used as concrete aggregates for building walls … ” http://nyti.ms/8ZnJ6g