Which of the following is greenhouse gas?

Options

A. `CH_(4)`
B. `H_(2)`
C. `O_(3)`
D. All of these

Answer

To determine which of the following is a greenhouse gas, let's follow these steps:

### Step 1: Understand what greenhouse gases are
Greenhouse gases are gases that trap heat in the atmosphere, contributing to the greenhouse effect. They allow sunlight to enter the atmosphere but prevent some of the heat that the sunlight brings from leaving the atmosphere.

### Step 2: Identify common greenhouse gases
Common greenhouse gases include:
- Carbon dioxide (CO2)
- Methane (CH4)
- Nitrous oxide (N2O)
- Ozone (O3)
- Water vapor (H2O)

### Step 3: Analyze the options provided
If the question lists specific gases, we need to check each one against the list of known greenhouse gases.

1. **Methane (CH4)** - This is a greenhouse gas.
2. **Hydrogen (H2)** - This is not a greenhouse gas.
3. **Heat** - This is a form of energy, not a gas, and does not qualify as a greenhouse gas.
4. **Ozone (O3)** - This is also a greenhouse gas.

### Step 4: Conclusion
Based on the analysis, the greenhouse gases from the options provided are:
- Methane (CH4)
- Ozone (O3)

### Final Answer
The greenhouse gases among the options are Methane and Ozone.

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