POTENTIAL SOURCES OF CO2 AND THE OPTIONS FOR ITS LARGE-SCALE UTILIZATION NOW AND IN THE FUTURE

The current emissions of CO2 to the atmosphere through man-made activi ties are outlined and the options for recycling CO2 for some useful pu rpose, as distinct from simply storing or disposing it in an environme ntally-benign manner, are discussed. It is shown that for CO2 recyclin g to have any significant impact on reducing emissions of this gas, it must form part of some large-scale energy conversion process which is based on a non-fossil-fuel energy source such as solar or nuclear ene rgy. Since the quantities of undiluted CO2 available for recycling are relatively small, the cost of recovering CO2 from sources such as pow er station flue gas must be taken into account in the overall CO2 recy cling/energy conversion scheme.