Question

The greenhouse effect is because of the

• A. presence of gases, which in general are strong infrared absorbers, in the atmosphere.
• B. presence of \( \text{CO}_2 \) only in the atmosphere.
• C. presence of \( \text{O}_3 \) and \( \text{CH}_4 \) in the atmosphere.
• D. \( \text{N}_2 O \) and chlorofluorohydrocarbons in the atmosphere.

Hint:

The greenhouse effect occurs when gases in the atmosphere trap heat by absorbing and emitting infrared radiation.

Answer 1

The Correct Option is A

Step 1: Understand the greenhouse effect.
The greenhouse effect is primarily due to the presence of gases such as \( \text{CO}_2 \), \( \text{CH}_4 \), and water vapor in the atmosphere, which absorb infrared radiation and trap heat.
Step 2: Conclusion.
The greenhouse effect is caused by gases that absorb infrared radiation. Final Answer: \[ \boxed{\text{Presence of gases, which in general are strong infrared absorbers, in the atmosphere.}} \]