Oh I do hate arguing over semantics.
Let me rephrase, Methane pollution from the agriculture industry is by far the most devastating to the atmosphere.
I don't want to get into this debate but it isn't as simple as a pie chart. However much you wish to interpret data to fit your narrative(such as grouping diriect and indirect because it equals a bigger number, regardless of what it means), there is a plethora of factors you have not considered, for instance, the differences in impact between CO2 and Methane: what is the magnitude of change for 1M3 of CO2 compared to 1M3 of Methane, on the atmosphere? How will CO2 molecules change O3 compared to that of Methane? I don't want to get into the Physics and explain the molecular details, google it if you want to, however Methane is much more 'deadly' to the atmosphere than CO2.
You say to look at the data then present an insultingly simplistic graphic. Awesome. I do love how basic reddit arguments can get all to prove a point.
Agriculture may not emit the largest 'amount' of greenhouse gases, but they do far, far more damage than the others. It's Volume x damage = Net Damage, not just comparing Volumes.
I'm out. I rarely like to debate on this subreddit, it never goes well.