Which of the following contribute to green house effect?

Options

A. Carbon dioxide
B. Chlorofluoro carbon
C. Freon
D. Methane

Answer

**Step-by-Step Solution:**

1. **Understanding the Greenhouse Effect:**
- The greenhouse effect is a natural process that warms the Earth's surface. It occurs when the Sun's energy reaches the Earth, and some of this energy is absorbed while some is reflected back into space.

2. **Identifying Greenhouse Gases:**
- Greenhouse gases are those that contribute to the greenhouse effect. Common greenhouse gases include:
- Carbon Dioxide (CO2)
- Methane (CH4)
- Chlorofluorocarbons (CFCs)
- Nitrous Oxide (N2O)
- Water Vapor (H2O)
- Other gases (referred to as ETC in the transcript)

3. **Analyzing the Given Options:**
- The question provides four options:
1. Carbon Dioxide
2. Chlorofluorocarbon
3. Freon
4. Methane

4. **Evaluating Each Option:**
- **Carbon Dioxide (CO2):** Yes, it contributes to the greenhouse effect.
- **Chlorofluorocarbon (CFC):** Yes, it contributes to the greenhouse effect.
- **Freon:** No, it does not contribute to the greenhouse effect.
- **Methane (CH4):** Yes, it contributes to the greenhouse effect.

5. **Conclusion:**
- The gases that contribute to the greenhouse effect from the options provided are Carbon Dioxide, Chlorofluorocarbon, and Methane. Freon is the only gas listed that does not contribute to the greenhouse effect.

**Final Answer:**
- The gases that contribute to the greenhouse effect are Carbon Dioxide, Chlorofluorocarbon, and Methane. Freon does not contribute to the greenhouse effect.

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