(Solved): The greenhouse effect on a molecule of greenhouse gas depends on which gas it is.Global warming pote ...

The greenhouse effect on a molecule of greenhouse gas depends on which gas it is.Global warming potential (GWP) is the relative measure of how much heat a known
mass of a GHG traps over a number of years compared to the same mass of carbon dioxide.

Carbon dioxide has a GWP of 1 and methane has a GWP of 21, which means that methane traps 21 times as much heat as the same mass of carbon dioxide.

What do the graph and table suggest about changes in the relative importance of the GHGs? 

Figure 7.2.9 Major GHGs information Source: adapted from 'Recent Greenhouse Gas Concentrations' by T. J. Blasing, from http://cdiac.ornl.gov (source: Rutherford, J., \& Williams, G. (2015). Environmental Systems and societies: Course companion. Oxford University Press.) GHG (excluding ozone)