Eureka!
I have discovered the secret ingredient of Pesto sauce.
Farts. Yes, farts. Compressed, liquified, freeze dried, and ground up into a coarse paste. Hence the green color.
This is a direct observation discovery. The human digestive system adds digestive juices to the sauce and reconstitutes the farts. Apparently, they use predominantly the farts of water buffalo with digestive dieseases.
I say “human” with the disclaimer that I’m speaking of “mine”. Make of it what you will.

Well, like you said before. Go Green!
Chlorphyl. enough said
Og, you numbskull, you are allergic to cow’s milk, ie cheese.
Yep. Ain’t it grand? The gas is stupendous.
If you produce enough need to run a pipe up to the intake and have a little more mileage.
Paul, bastard might just blow a head that way. The poor old Sploder can’t handle the extra abuse.