We've submitted many reports documenting the fact that industrial effluent, or even atmospheric, Carbon Dioxide can be effectively recycled, and converted into a number of valuable products, including liquid hydrocarbon fuels, through the industrialized mediation of specific microorganisms, with Green Algae being most often employed.
Our own United States Department of Energy, especially, has focused a great deal of effort on the development of such Algae-based technology, as our more recent spate of reports on their activities in that area of endeavor might reflect.