Total O₃ abundances for models with high N₂O (left) and low N₂O (right) normalized to models with modern levels of N₂O from Kozakis et al. (2022). Overall, the high N₂O models impacted the O₂-O₃ relationship more than the low N₂O models, with the results being highly dependent on the stellar host and the amount of O₂. High N₂O models with hotter stars experience significant O₃ depletion due to faster NO_x catalytic cycles caused by increased N₂O. However, for the high N₂O models at very low O₂ levels, planets around all the hosts experience an increase in O₃ due to the higher efficiency of the smog mechanism once the Chapman mechanism is limited by low amounts of O₂. The M5V-hosted planet in particular experiences an increase in O₃ with the high N₂O models beginning at 10% PAL O₂ and lower, due to the increased capabilities of the smog mechanism in this lower UV environment.