In this interview with Dr. Mercola, Dr. Don Huber gives a thorough presentation on the problems associated with GMO crops and the use of glyphosate, commonly known as Round UP.  He discusses that it was originally patented as a chelator, and due to these properties, micro-nutrients are not being bound in plants – meaning that those plants become deficient in those micro-nutrients.  According to Huber, this can disrupt enzyme functions which in turn can disrupt endocrine systems.  The interview is 57 minutes long, but it is definitely worth watching every minute of it.

Dr. Huber is a staff professor at Purdue University.  He is an agricultural scientist and expert in microbial ecology.

http://www.youtube.com/watch?v=X4swW9OFmf8&feature=player_embedded