Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. Because of the depletion of the ozone layer, humans are being exposed to the harmful ultraviolet radiations of the sun. This results in serious health issues among humans, such as skin diseases, cancer, sunburns, cataract, quick ageing and an weak immune system.1. In which sphere Ozone layer depletion is found?a. Ionosphereb. Stratospherec. Lithosphered. None of these2. Main cause of ozone holes and its depletion isa. Propellantsb. Foam-blowing agentsc. Halocarbon refrigerantsd. All of these3. What is a major risk linked with extreme ultraviolet rays through the atmosphere as a result of ozone layer depletion?a. Neurological disorderb. Digestive system gets damagedc. Increased liver cancerd. Increased skin cancer4. CFCs are used as _______a. fuel in airplanesb. refrigerants in cooling unitsc. paintd. All of these5. What element makes up ozone?a. O2b. NOc. O3d. NO2