The Odorants trans-3-hexenal, cis-3-hexen-1-ol and 1-hexanol share the highest threshold value among the eight odorants tested and range from 8.1 x 10¹⁰ to 8.1 x 10¹¹ molecules/cm³.   The threshold values for n-hexanal and cis-3-hexenal fall within the same range (8.1 x 10⁸ to 8.1 x 10⁹ molecules/cm³) .The only double bond odorant which scored the lowest   threshold value   when compared to single bond odorants is trans-2-hexenal (8.1 x 10⁷ to 8.1 x 10⁹ molecules/cm³). Statistical analysis shows there is no statistical difference between the threshold values of “green” odors with double bond and without double bond (Wilcoxon signed rank test; p> 0.01).