Multiple choice

The other 1% of air is composed of greenhouse gas which include all of the following EXCEPT

  1. Water Vapor

  2. Methane

  3. Helium

  4. Carbon Dioxide

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

Helium is an inert noble gas and is not a greenhouse gas. Water vapor, methane, and carbon dioxide are all potent greenhouse gases.