How do aircraft damage the ozone layer?

Answer 1

Consuming oxygen that took months to diffuse to that level, adding water vapor to the atmosphere (water vapor depletes ozone), and heating the atmosphere a little bit, which lets more water vapor cross over into the ozone layer.

Answer 2

Aircraft emit pollutants like nitrogen oxides and water vapor into the atmosphere at high altitudes. These pollutants can react with ozone molecules in the stratosphere, contributing to ozone depletion. The ozone layer protects the Earth from harmful ultraviolet radiation, so any damage to it can have negative consequences for living organisms.