It has been demonstrated that the combustion of fossil fuel accounts for 97% of the carbon dioxide generated in the UK. The demand for primary energy over the 1970-1994 period has only marginally increased, however the demand for natural gas which has a significantly lower carbon content per unit of energy than other fuels accounts largely for the lowering of carbon dioxide emissions, The enactment UK/EU Environmental Legislation coupled with World Agreements accounts for a significant lowering of carbon dioxide emissions over this period, Future predictions suggest that a further downturn in carbon dioxide emissions will take place over the 1990-2000 period, followed by a pronounced increase over the 2000-2020 period, The expansion of the use of CCGT and/or the introduction of the IGCC and the SUPC in the power generating sector provides an opportunity for a further reduction in carbon dioxide emissions.