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 of selecting the incorrect statement from the provided options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement Analysis:**
- **Statement 1:** "Most of the forests have been lost in the tropical areas."
- **Analysis:** Research indicates that approximately 40% of forests have been lost in tropical regions, which is significantly higher compared to only 1% loss in temperate regions. Therefore, this statement is **true**.

2. **Statement 2:** "Ozone is the upper part of atmosphere and is bad ozone and is harmful to animals."
- **Analysis:** The ozone layer, located in the stratosphere, is known as "good ozone" because it protects the Earth from harmful UV rays. In contrast, ozone in the troposphere (lower atmosphere) is considered "bad ozone" and is harmful to animals. Thus, this statement is **incorrect** because it mischaracterizes the ozone in the upper atmosphere.

3. **Statement 3:** "Greenhouse effect is a natural phenomenon which heats the earth atmosphere."
- **Analysis:** The greenhouse effect is indeed a natural process that retains heat in the Earth's atmosphere, allowing the planet to maintain a temperature suitable for life. This statement is **true**.

4. **Statement 4:** "Eutrophication is a natural phenomenon in freshwater bodies which causes natural aging of lakes."
- **Analysis:** Eutrophication refers to the process where water bodies become enriched with nutrients, leading to increased plant growth and decay, which can result in the aging of lakes. This statement is also **true**.

### Conclusion:
The only incorrect statement among the options provided is **Statement 2**: "Ozone is the upper part of atmosphere and is bad ozone and is harmful to animals."