Question
Ozone layer in the stratosphere is crucial because it:
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HTET 2025 Level 1 PRT Question Paper (5-Jul-2026)
The correct answer is
absorbs most harmful ultraviolet-B radiation
The stratospheric ozone layer absorbs most of the sun's harmful ultraviolet-B (UV-B) radiation before it reaches the Earth's surface. Without this protective shield, high UV-B exposure would sharply increase risks of skin cancer, cataracts, and damage to plant and marine life. It does not trap infrared radiation or directly generate oxygen.
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