greatest amount of emissions into the biosphere. They also have the capital needed to finance megaprojects. It is obvious from both an environmental and financial point of view that they are the place where satellite power systems should be first introduced. However, according to Starr and Searl (1990) there is a historical time constant of a half-century for substantial changes in the mix of large scale energy systems. This is in keeping with both the planned life expectancy of generation facilities (30 years) and the rate of capital formation that takes place within a new industry. It also fits with the 17 year cycle required for new ideas to penetrate existing power structures and to start to have an effect on the younger decisionmakers moving into
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