Well actually that is a very good question. "Who did document how much greenhouse gas a cow produces? And did they have an agenda when they did?"
I shared that vision, and it was funny, until I realized that we probably have already paid some stupid liberal probably associated with PETA through a grant to measure this so that our beef could be taxed.
Being a very non-scientific person, let me see how this mightv be accomplished.
Liberal PETA tester sneaks up behind the cow. Peta tester has an ample supply of un-inflated plastic bags and a large roll of duct tape.
Said tester surreptitiously tapes numbered plastic bag over cow's behind, almost diaper-like.
(Gawd, I need a picture of this...Registered, one of you talanted people?)
The next day PETA POOT TESTER returns, removes numbered bag and sends it to the PPTL (PETA POOT TESTER LAB) to determine exact ammount of gaseous content. There, the flatulance is seperated from the poop...
I can't go on with this!!! My mind is starting to get jelly-like!