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 (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. Chlorofluorocarbons released from the surface of the Earth, rise slowly into the stratosphere.This is the gas responsible for depletion of ozone layer.

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