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Assertion :The ozone hole refers to a decrease in the layer of ozone gas found high in the Earth's atmosphere, which helps to shield the planet from the sun's harmful ultraviolet rays. Reason: The ozone layer has become thinner because of chemicals that were once commonly used in products ranging from spray cans to foam furniture cushions.
Assertion :The ozone hole refers to a decrease in the layer of ozone gas found high in the Earth's atmosphere, which helps to shield the planet from the sun's harmful ultraviolet rays. Reason: The ozone layer has become thinner because of chemicals that were once commonly used in products ranging from spray cans to foam furniture cushions.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
CFCs and other contributory substances are referred to as ozone-depleting substances (ODS). Since the ozone layer prevents most harmful UVB wavelengths (280–315 nm) of ultraviolet light (UV light) from passing through the Earth's atmosphere, observed and projected decreases in ozone generated worldwide concern, leading to adoption of the Montreal Protocol that bans the production of CFCs, halons, and other ozone-depleting chemicals such as carbon tetrachloride and trichloroethane. It is suspected that a variety of biological consequences such as increases in sunburn, skin cancer, cataracts, damage to plants, and reduction of plankton populations in the ocean's photic zone may result from the increased UV exposure due to ozone depletion.
CFCs and other contributory substances are referred to as ozone-depleting substances (ODS). Since the ozone layer prevents most harmful UVB wavelengths (280–315 nm) of ultraviolet light (UV light) from passing through the Earth's atmosphere, observed and projected decreases in ozone generated worldwide concern, leading to adoption of the Montreal Protocol that bans the production of CFCs, halons, and other ozone-depleting chemicals such as carbon tetrachloride and trichloroethane. It is suspected that a variety of biological consequences such as increases in sunburn, skin cancer, cataracts, damage to plants, and reduction of plankton populations in the ocean's photic zone may result from the increased UV exposure due to ozone depletion.
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