As vegetarianism is getting a real hype in the past few years, it's a great topic to do research on. It also is a subject with influence on the future relating to global warming. That point of view I missed in your report.
The Interview with Mr. Erwin Kündig from the "Heggenhof" was interesting and opened my eyes on the overconsumption of meat in our society. Eating meat twice a day just like Mr. Kündig is too much.
I am impressed about the fact that you have collected this much data for the diagrams. They are realy good!