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What is the effect of ozone present in the troposphere (lower atmosphere)?

1. Protects us from the UV radiation
2. Protects us from the X-ray radiation
3. Protects us from greenhouse effect
4. generates photochemical smog

Correct answer: generates photochemical smog

Solution

Useful UV-blocking ozone lies in the stratosphere; ozone at ground level (troposphere) is a harmful pollutant that contributes to photochemical smog.

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