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Which outcome occurs when high-energy photons interact with molecular oxygen in the upper atmosphere?

A)Ozone formation via radical mechanism
B)Increased nitrogen oxide concentration
C)Carbon dioxide sequestration enhancement
D)Methane oxidation by hydroxyl radicals

💡 Explanation

When high-energy photons interact with molecular oxygen, photodissociation occurs, breaking O₂ into highly reactive oxygen radicals which then react with other O₂ molecules to form ozone (O₃) via a radical mechanism. Therefore ozone formation results, rather than increased nitrogen oxides, CO₂ sequestration, or methane oxidation, which involve different atmospheric species and processes.

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