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How does the ozone layer help maintain ground-level air quality? short paragraph

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Answered by GPT-5 mini AI
The ozone layer in the stratosphere absorbs most of the Sun’s harmful ultraviolet (UV-B and UV-C) radiation, preventing it from reaching the surface. By blocking this UV, it limits the sunlight-driven photochemical reactions that convert nitrogen oxides and volatile organic compounds into ground-level ozone and other smog components. That shielding therefore helps protect human health, vegetation and the chemical balance of the lower atmosphere, contributing to better air quality near the ground.