Which green house gas contributes the least to global warming ?

Options

A. `CH_(4)`
B. `CFC`
C. `N_(2)O`
D. `CO_(2)`

Answer

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

### Step 1: Identify Major Greenhouse Gases
The primary greenhouse gases that contribute to global warming include:
- Carbon Dioxide (CO2)
- Methane (CH4)
- Nitrous Oxide (N2O)
- Chlorofluorocarbons (CFCs)
- Water Vapors

### Step 2: Understand the Contribution of Each Gas
Each greenhouse gas has a different contribution percentage to global warming:
- Carbon Dioxide (CO2): approximately 60%
- Methane (CH4): approximately 20%
- Chlorofluorocarbons (CFCs): approximately 14%
- Nitrous Oxide (N2O): approximately 6%

### Step 3: Compare the Contribution Percentages
From the percentages given:
- CO2 contributes the most at 60%.
- CH4 follows with 20%.
- CFCs contribute 14%.
- N2O contributes the least at 6%.

### Step 4: Conclusion
Based on the contributions, the greenhouse gas that contributes the least to global warming is Nitrous Oxide (N2O).

### Final Answer
The greenhouse gas that contributes the least to global warming is Nitrous Oxide (N2O).

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