Abstract: | The author discusses the uncertainties and shortcomings that surround the current models of the carbon cycle, climatic change, and energy consumption; all are required in predicting the effect of carbon dioxide (CO2) on climate. Using estimates of energy consumption in 2025 the author defines the boundaries of the problem: a global warming (preponderantly at the poles), and unpredictable (at present) regional climatic variations. The implications for energy policy are discussed, and it is concluded that all options must be kept open at present. |