The correct answer is Nitric oxide.?Aircraft produce water, in exhaust gases. Gases like nitric oxide coming from these jets cause the depletion of the ozone layer.The ozone layer forms the upper atmosphere, also known as the ozonosphere.The ozone molecules shield and protect our planet from harmful solar radiation.All the commercial flights are confined to the troposphere, but high-level supersonic aircraft inject pollutants into the stratosphere, which leads to the thinning of the ozone layer.Ozone (O3) is the allotrope of OxygenCO2 is carbon dioxide, while SO2 is sulphur dioxide.Additional Information September 16 is celebrated as World Ozone Day.Montreal Protocol on Substances that Deplete the Ozone LayerIt is an international treaty designed to protect the ozone layer from Chlorofluorocarbons (CFCs).Ozone Layer Depletion:The ozone layer is the thin shield high up in the sky that stops ultra-violet rays from reaching the earth. As a result of human activities, chemicals, such as chlorofluorocarbons (CFCs) were released into the atmosphere, which contributed to the depletion of the ozone layer.