Monoculture is not healthy. It is not natural and it will lead to a de-verisification of insect life and everything that depends on insects.

In addition, corn requires high nitrogen fertilizer that is typically made from chemicals and petroleum. Most of this inorganic fertilizer gets washed off into the Gulf of Mexico where it depletes the water of oxygen which is reducing biomass and diversity. Here’s a pretty informative website that explains the process http://serc.carleton.edu/microbelife/topics/deadzone/.

Besides, using corn for biofuel diverts it from food processing which further drives up the cost of food. Plus a monoculture can be easily wiped out by one insect. This is what happened in the early 1900s to the U.S. cotton crop. http://outreach.lib.uic.edu/www/issues/issue7_2/quarterman/index.html

I can't believe how many people jumped on the "corn for fuel" bandwagon wasting time and money on something that will only hurt us in the long run instead of pursuing any of a dozen more environmental and economically friendly options....Wait, I forgot "Corn is King"