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Determining energy research needs for the distant future A process for evaluating technology-development options to meet future energy needs. The process evaluates threats to continued reliance on current energy sources, establishes strategic R&D goals, determines how a technology addresses threats and strategic goals, identifies uncertainties and affordability risks, determines technical problems, and establishes R&D needs and opportunities. A case study of fuel cells and coal gasification for electricity generation illustrates the application and advantages of the approach.