Answer» Correct Answer - Option 4 : Chloro fluro carbon
The correct answer is Chloro Fluro carbon. - The ozone layer is a layer in the earth’s stratosphere that contains high levels of ozone.
- This layer of ozone absorbs 97 - 99 % of the UV radiation from the sun and protects the earth from UV rays.
- Chemical compounds that cause ozone layer depletion is called (ODSs) Ozone Depleting Substances.
- Chlorofluorocarbons, Carbon tetrachloride, hydrochlorofluorocarbons, methyl chloroform, hydro Bromo fluorocarbons, halons are examples of ODSs.
- When ODSs come into contact with ozone, they destroy it and it is called Ozone layer depletion.
- On earth, Fauna is also adversely affected by ozone layer depletion.
- 16 September is observed as "World Ozone day".
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