Select the incorrect statement from the following.

Options

A. Most of the forests have been lost in tropical areas.
B. Ozone is upper part of atmosphere is bad ozone and harmful to animals .
C. Greenhouse effect is a natural phenomenon which heats the earths atmosphere.
D. Eutrophication is a natural phenomenon in freshwater bodies which causes natural ageing of lakes.

Answer

To solve the question, we need to analyze each statement provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Examine the First Statement:**
- **Statement:** "Most of the forests have been lost in tropical areas."
- **Analysis:** This statement refers to deforestation, which is indeed a significant issue in tropical regions. Studies indicate that around 40% of forests have been lost in these areas.
- **Conclusion:** This statement is **correct**.

2. **Examine the Second Statement:**
- **Statement:** "Ozone in the upper part of the atmosphere is bad ozone and harmful to animals."
- **Analysis:** The upper part of the atmosphere, specifically the stratosphere, contains "good" ozone, which protects living organisms from harmful UV radiation. The "bad" ozone is found at ground level (troposphere) and is harmful to health.
- **Conclusion:** This statement is **incorrect**.

3. **Examine the Third Statement:**
- **Statement:** "Greenhouse effect is the natural phenomena which affects the earth's atmosphere."
- **Analysis:** The greenhouse effect is indeed a natural phenomenon that traps heat in the atmosphere, contributing to the warming of the Earth. It is caused by greenhouse gases such as carbon dioxide and methane.
- **Conclusion:** This statement is **correct**.

4. **Examine the Fourth Statement:**
- **Statement:** "Eutrophication is the natural phenomena in freshwater bodies which causes natural aging of lakes."
- **Analysis:** Eutrophication is a process that involves nutrient enrichment (mainly nitrogen and phosphorus) in water bodies, leading to increased plant growth and decay, which can result in the aging of lakes. This is a natural process.
- **Conclusion:** This statement is **correct**.

### Final Conclusion:
The incorrect statement among the options provided is the **second statement** regarding ozone.