The supersonic jets cause pollution by the thinning of the:

Explanation

Supersonic jets, like the Concorde, can potentially contribute to environmental pollution, particularly in the upper atmosphere. Depletion of the ozone is due to the action of sunlight over pollutants that release chemicals (e.g., chlorine) to destroy ozone. Ozone-depleting substances react with the ozone present in the stratosphere and destroy the same. The major ODS are chlorofluorocarbons (14% of total depletion), nitrogen oxides (3.5% of total depletion), sulphur dioxide, halon, carbon tetrachloride, methyl chloroform, chlorine, etc. Many of these are being released by jets flying in the stratosphere and rockets being fired into space. A major contributor of these gases is the USA.