Multiple choice

The greenhouse effect is a natural process that warms Earth's surface. Which of the following is not a greenhouse gas?

  1. Carbon dioxide

  2. Methane

  3. Nitrogen oxide

  4. Water vapour

  5. Argon

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

This is the correct answer as argon is a noble gas which does not form oxides. It is not a greenhouse gas.