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Table 2 Reductions (%) of WTW fossil energy use and GHG emissions by sorghum-based ethanol, relative to gasoline

From: Life-cycle energy use and greenhouse gas emissions of production of bioethanol from sorghum in the United States

   I II III(a) III(b) IV V(a) V(b)
Fossil energy Mean 57 83 82 84 66 77 78
Rangea 52–63 78–88 80–86 81–88 58–73 74–81 75–82
GHG Mean 35 56 71 72 49 70 72
Rangea −3–60 18–83 55–82 57–84 28–65 57–80 58–82
  1. a The lower bound of the range is the ratio of the difference of the P10 value of the baseline gasoline and the P90 value of each pathway to the P10 value of gasoline. The upper bound of the range is the ratio of the difference of the P90 value of gasoline and the P10 value of each pathway to the P90 value of gasoline.