Question

Which among the following is a greenhouse gas?

• A. Methane
• B. Oxygen
• C. Nitrogen
• D. Hydrogen

Hint:

Remember the key greenhouse gases: CO₂, CH₄, N₂O, O₃, and water vapor. These gases trap heat and influence Earth's climate.

Answer 1

The Correct Option is A

Step 1: Greenhouse Gas Identification.
Greenhouse gases absorb and re-emit infrared radiation, leading to atmospheric warming and subsequent climate change.

Step 2: Gas Analysis.
- Methane (CH₄): Exhibits a high global warming potential, significantly exceeding that of carbon dioxide.
- Oxygen (O₂): A vital component for biological respiration, but it does not contribute to the greenhouse effect.
- Nitrogen (N₂): The most abundant gas in the atmosphere; it is chemically inert and not a greenhouse gas.
- Hydrogen (H₂): A very light element, not classified as a greenhouse gas.

Step 3: Determination.
Therefore, the substance identified as a greenhouse gas is Methane.

Final Answer: \[\boxed{\text{Methane is the greenhouse gas.}}\]