Which of the following gas contributes maximum in global warming ?

Options

A. `CH_4`
B. `CO_2`
C. `N_2O`
D. CFSs

Answer

To determine which gas contributes the most to global warming, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Global Warming**:
- Global warming refers to the increase in Earth's average surface temperature due to rising levels of greenhouse gases in the atmosphere.

2. **Identify Greenhouse Gases**:
- The main greenhouse gases include Methane (CH4), Carbon Dioxide (CO2), Nitrous Oxide (N2O), and Chlorofluorocarbons (CFCs).

3. **Analyze Contribution of Each Gas**:
- Research indicates that different greenhouse gases contribute differently to global warming.
- Carbon Dioxide (CO2) is known to have the largest share of the contribution, followed by Methane (CH4), Chlorofluorocarbons (CFCs), and then Nitrous Oxide (N2O).

4. **Quantify Contributions**:
- Based on data, the contributions are approximately:
- Carbon Dioxide (CO2): 60%
- Methane (CH4): 20%
- Chlorofluorocarbons (CFCs): 14%
- Nitrous Oxide (N2O): 6%

5. **Determine the Gas with Maximum Contribution**:
- From the above percentages, it is clear that Carbon Dioxide (CO2) contributes the most to global warming.

6. **Select the Correct Option**:
- Therefore, the correct answer to the question is Carbon Dioxide (CO2).

### Final Answer:
The gas that contributes the maximum to global warming is **Carbon Dioxide (CO2)**.

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