Energy resources processing technical problems

X 10l5 bTU of fusion energy would be required to supply all U.S. energy needs (with exceptions noted above). The total amount of deuterium needed to produce this energy (assuming 100% efficiency for the D-D fusion reaction) would be only 1000 tons D2 per year (5000 tons D2O). If the technical problems can be overcome, the fusion process promises to be astonishingly efficient from the standpoint of resource consumption ... 

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