I came across this wonderful documentary today about the food industry that is both alarming and helpful to those concerned. I've been aware of the issue of Genetically Modified/Engineered food for many years but this film provides a lot more detail.
I hope you find this film informative and useful. Check out "The Future of Food".
http://www.imdb.com/video/hulu/vi2420179737/
http://www.hulu.com/watch/67878/the-future-of-food (alternate mirror)
If the above links expire, check out the films home page at
http://www.thefutureoffood.com/
And there's a wonderful interview of the maker of the documentary here.
Matthew Cox . org
http://matthewcox.org/article.php/genetically-engineered-modified-tyranny