The gases causing greenhouse effect is/are

Options

A. `CH_4`
B. `NO_2`
C. `SO_2`
D. `O_3`

Answer

To answer the question about the gases causing the greenhouse effect, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Greenhouse Effect**: The greenhouse effect occurs when certain gases in the Earth's atmosphere trap heat. This process is essential for maintaining the Earth's temperature but can lead to global warming when excessive greenhouse gases are present.

2. **Identify Common Greenhouse Gases**: The primary gases that contribute to the greenhouse effect include:
- Carbon Dioxide (CO2)
- Methane (CH4)
- Nitrous Oxide (N2O)
- Ozone (O3)
- Water Vapor (H2O)
- Chlorofluorocarbons (CFCs)

3. **List the Gases**: From the above list, we can identify the gases that are commonly recognized as greenhouse gases:
- Carbon Dioxide (CO2)
- Methane (CH4)
- Nitrous Oxide (N2O)
- Ozone (O3)
- Water Vapor (H2O)
- Chlorofluorocarbons (CFCs)

4. **Select the Correct Options**: Based on the question, we need to identify which of the gases listed are responsible for the greenhouse effect. The correct answers include:
- Carbon Dioxide (CO2)
- Methane (CH4)
- Nitrous Oxide (N2O)
- Ozone (O3)
- Water Vapor (H2O)
- Chlorofluorocarbons (CFCs)

5. **Conclusion**: The gases causing the greenhouse effect are Carbon Dioxide (CO2), Methane (CH4), Nitrous Oxide (N2O), Ozone (O3), Water Vapor (H2O), and Chlorofluorocarbons (CFCs).

### Final Answer:
The gases causing the greenhouse effect are:
- Carbon Dioxide (CO2)
- Methane (CH4)
- Nitrous Oxide (N2O)
- Ozone (O3)
- Water Vapor (H2O)
- Chlorofluorocarbons (CFCs)