Page:Brundtland Report.djvu/172



9. How practical are any of these scenarios? Energy analysts have conducted many studies of global energy futures to the years 2020-2030. Such studies do not provide forecasts of future energy needs, but they explore how various technical, economic, and environmental factors may interact with supply and demand. Two of these are reviewed in Box 7-2, though a much wider range of scenarios - from 5 TW up to 63 TW – are available. /…