Column-integrated mixing ratios of (top) CO₂ (red), CO (green), O₂ (blue), (bottom) O₃ (yellow), HO₂ (orange), H₂O₂ (dark blue), and OH (magenta) as functions of the total atmospheric hydrogen mole fraction for Cases 1 through 6. This mole fraction is calculated by dividing the number of hydrogen atoms in the atmosphere by the total number of atoms in the atmosphere. The points indicate the results of the actual cases, which are connected by lines. In the bottom panel we show the range in Earth's O₃ mixing ratio ﹩f{({{{\rm O}}}_{3})}^{\mathrm{Earth}}﹩ (Yung & DeMore 1999). Note the different y-axis scales of the top and bottom panels.