It’s more than $5 or $8 a gallon. Worth a watch: http://centerforinvestigativereporting.org/articles/the-price-of-gas-4865
This seems to be the hypothesis of doctors James Braly and Ron Hoggan, in “Dangerous Grains: Why Gluten Cereal Grains May Be Hazardous to Your Health”. The authors also indicate that gluten sensitivity is congenital which could explain why asthma, polymyagia, celiac disease and diabetes might also run in families. I probably wont get time to read much of this book, but its worth looking into.