Greenhouse effect with respect to global climate refers to :

Options

A. cooling and moist condition
B. warming effect
C. increase rainfall and greenery
D. desertification

Answer

### Step-by-Step Solution:

1. **Understanding the Greenhouse Effect**:
- The greenhouse effect is a natural process that warms the Earth’s surface. When the Sun’s energy reaches the Earth, some of it is reflected back to space and the rest is absorbed, warming the planet.

2. **Role of Greenhouse Gases**:
- Certain gases in the Earth’s atmosphere, known as greenhouse gases (like carbon dioxide (CO2), methane (CH4), and water vapor), trap heat. These gases allow sunlight to enter the atmosphere but prevent some of the heat that the sunlight brings from leaving the atmosphere.

3. **Impact of Increased Greenhouse Gases**:
- Due to human activities, such as burning fossil fuels and deforestation, the concentration of these greenhouse gases is increasing. This enhances the greenhouse effect, leading to more heat being trapped in the atmosphere.

4. **Consequences on Global Climate**:
- The increase in trapped heat results in a rise in the Earth’s average temperature, contributing to global warming. This change in temperature affects global climate patterns, leading to various environmental issues.

5. **Evaluating the Options**:
- Now, let’s evaluate the provided options:
- **Cooling and moist condition**: This is incorrect as the greenhouse effect leads to warming.
- **Warming effect**: This is correct as it describes the primary consequence of the greenhouse effect.
- **Increased rainfall and greenery**: This is not a direct consequence of the greenhouse effect.
- **Desertification**: This is also not a direct result of the greenhouse effect.

6. **Conclusion**:
- The correct answer to the question is the "warming effect," which is option number 2.