Multiple choice

Which of the following is not a primary contributor to the greenhouse effect?

  1. Carbon dioxide

  2. Carbon monoxide

  3. Chlorofluorocarbons

  4. Methane gas

  5. Nitrous oxide

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

Chlorofluorocarbons released from the surface of the Earth, rise slowly into the stratosphere. This is the gas responsible for depletion of ozone layer.