Remember the distinction: "Good ozone" is in the stratosphere (upper atmosphere, acts as a shield), while "bad ozone" is in the troposphere (lower atmosphere, acts as a pollutant).
Ozone in upper part of atmosphere is harmful to animals
Eutrophication is a natural phenomenon in freshwater bodies.
Most of the forest have been lost in tropical areas.
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The Correct Option isB
Solution and Explanation
Step 1: Understanding the Concept:
This question covers basic ecological and environmental principles, including the greenhouse effect, atmospheric ozone distribution, eutrophication of aquatic ecosystems, and deforestation patterns. Step 2: Detailed Explanation:
Let us evaluate each of the given statements to find the incorrect one:
Statement (A): The greenhouse effect is indeed a natural phenomenon. Without natural greenhouse gases (like water vapor and carbon dioxide) trapping heat, the Earth's average surface temperature would be a frozen \(-18\text{ }^\circ\text{C}\) instead of the hospitable \(+15\text{ }^\circ\text{C}\). Anthropogenic activities have merely enhanced this natural effect. This statement is correct.
Statement (B): Atmospheric ozone (\(O_3\)) is distributed in two main layers:
1. Stratospheric ozone (in the upper atmosphere) acts as a protective shield that absorbs harmful solar ultraviolet (UV-B) radiation, protecting animals and plants from genetic damage.
2. Tropospheric ozone (ground-level) is a secondary pollutant that is highly toxic and harmful to respiratory systems.
Since ozone in the upper atmosphere is highly beneficial, stating that it is "harmful to animals" is incorrect. This statement isfalse.
Statement (C): Eutrophication is the natural aging process of a body of water (such as a lake) over centuries as it accumulates nutrients. While human activities can accelerate this process (cultural eutrophication), it remains a natural ecological succession process. This statement is correct.
Statement (D): Globally, the highest rates of deforestation and forest loss have occurred in tropical regions (e.g., the Amazon and Southeast Asia) due to agricultural expansion and logging. This statement is correct.
Thus, the wrong statement is (B). Step 2: Final Answer:
The correct option is (B).
