Multiple choice

Green house effect is due to the presence of�

  1. Ozone layer in the atmosphere

  2. Infra-red radiation

  3. Moisture in the atmosphere

  4. CO2 in the atmosphere

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The greenhouse effect is primarily caused by carbon dioxide (CO2) in the atmosphere, which traps infrared radiation emitted by Earth's surface and re-radiates it back, warming the planet. While water vapor contributes, CO2 from human activities is the dominant driver of enhanced greenhouse effect.