With the exception of water vapor, ________ is the most plentiful of the variable gases in the atmosphere.
A) argon
B) carbon dioxide
C) sulfur dioxide
D) ozone
E) carbon monoxide

Question

Quizplus · Accepted Answer

Carbon dioxide is the most plentiful of the variable gases in the atmosphere, after water vapor. The other answer choices listed are either present in much smaller amounts or are relatively constant in their concentration in the atmosphere.

With the Exception of Water Vapor, ________ Is the Most