The relative contribution of common gases in the atmosphere increase as a percentage of the Greenhouse effect in the following order (from lowest to highest percentage):

Question

Quizplus · Accepted Answer

CFC-12 and CFC-11 have a much higher global warming potential per molecule than carbon dioxide or methane, but because their concentrations are much lower in the atmosphere, their overall contribution to the greenhouse effect is less. Methane, while more potent on a per-molecule basis than carbon dioxide, is also less abundant. Carbon dioxide, despite being less effective per molecule at trapping heat, contributes the most to the greenhouse effect due to its much higher concentration.

The Relative Contribution of Common Gases in the Atmosphere Increase