Scroll down to the bottom of this page for an interesting fact:
http://www.greenpest.com.au/termite-information.html

I've found this site to be helpful in past research.
http://www.smellypoop.com/farts.html

I just skimmed this site. It seems to repeat a lot of the previous sites info but there could be some new stuff that you will find helpful.
http://www.heptune.com/farts.html