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Which one of the following is a wrong statement?

1. Most of the forests have been lost in tropical areas.
2. Ozone in upper part of atmosphere is harmful to animals.
3. Greenhouse effect is a natural phenomenon.
4. Eutrophication is a natural phenomenon in freshwater bodies.

Correct answer: Ozone in upper part of atmosphere is harmful to animals.

Solution

Ozone in the upper atmosphere (stratosphere) is not harmful; it protects living organisms by absorbing harmful UV radiation. The statement is incorrect.

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