Ozone is toxic to expanding leaves of almost all types of plant at the concentration of equal or more than

Ozone is toxic to expanding leaves of almost all types of plant at the concentration equal to or more than 0.1 ppm.
Ozone damages plants by entering leaf openings called stomata and oxidizing plant tissue during respiration.
Ozone causes considerable damage to plants around the world, including crops and plants in natural ecosystems. Ozone damages plants by entering leaf openings called stomata and oxidizing plant tissue during respiration. This damages the plant leaves and causes reduced survival.