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The problem of ozone hole is mainly related to the decline of which atmospheric element?

Answer and explanation

Correct answer: Stratospheric ozone

Answer: A. The ozone hole refers to a marked seasonal thinning of stratospheric ozone, especially over polar regions. Ozone is made of three oxygen atoms and is concentrated mainly in the stratosphere. It absorbs a large portion of harmful ultraviolet radiation from the Sun, particularly UV-B. When stratospheric ozone is depleted, more ultraviolet radiation can reach Earth’s surface, increasing risks to living organisms. A is correct because the issue concerns stratospheric ozone, not the complete disappearance of all ozone. B and C are wrong because nitrogen and argon are major atmospheric gases but are not the atmospheric substances whose depletion defines the ozone-hole problem. D is wrong because sea salt is an aerosol, not the protective gas layer being depleted. Common confusion: ozone near the ground can be a pollutant, while stratospheric ozone protects life from ultraviolet radiation; the location matters.

Related tags

Ozone HoleStratospheric OzoneUltraviolet RadiationAtmosphereCovers GaapTheory Base Of AccountingAccountancyClass 11 Mcq

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