How is Ozone layer depleted in the atmophere and what are the harmful effects caused by Ozone layer depletion ?

Explanation

`to` Ozone layer is present in stratosphere of the atmosphere.
`to` Ozone in the stratosphere is due to the following reaction .
`O_(2(g)) overset(UV) to O_((g)) + O_((g))`
`O_((g)) + O_(2(g)) hArr O_(3(g))`
`to` But due to industrialisation , certain chemical substances enter into stratosphere and and destroy the ozone .
`to` The following are the major substance that causes depletion of ozone layer .
(i) CFCs (Chloro fluoro carbons (or) freons) .
(ii) No (iii) `Cl_(2)` (Chlorine) .
`to` CFCs are colourless, odourless , lighter , non flammable , non toxic organic molecules which are used in refrigeratos, air conditioners, in the manufacturing of plastic foam and for cleaning computer parts .
`to` These CFCs enter in the stratosphere and deplete the ozone as follows.
`CF_(2)Cl_(2) overset(hv)to Cl^(**) + ""^(**)CF_(2)Cl`
`Cl^(**) O_(3) to ClO^(**) + O_(2)`
`ClO^(**) + O to Cl^(**) + O_(2)`
`to` Chlorine radicals `(Cl^(**))` are continuously generated and decompose `O_(3)`
`to` No released by super sonic jet planes and that formed by burning fossil fuels enters into stratosphere and decompose ozone .
`to Cl_(2)` decompose into `C l^(**)` radicals and these `Cl^(**)` deplete `O_(3)` by chain reactions.
Effects of depletion of the ozone layer (oxone hole) : Due to depletion of ozone more U.V enters into troposphere . This UV radiation leads to 1) ageing of skin 2) cataracts 3) skin burns 4) Skin cancer 5)damage to fish production 6) killing many phytoplanktons 7) effect plant proteins leading to the harmful mutation of cell . 8) evaporate surface water through the stomata of the leaves. 9) decreased moisture content of the soil . 10) damage paints , fiber, by fading them faster . 11) effect on photo synthesis etc.