Multiple choice

Which of the following contributes largely to the green-house gas effect?

  1. Ozone

  2. Carbon dioxide

  3. Carbon monoxide

  4. Water vapour
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon dioxide is the primary greenhouse gas emitted through human activities, such as burning fossil fuels. While water vapor is a greenhouse gas, carbon dioxide is the most significant contributor to the enhanced greenhouse effect.

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