You're right, I did not intend my comment to be an exhaustive rundown of a conversion. Where you afraid of your engine getting cancer? GM crops are not associated with cancer in animal studies. We don't make a lot of sugar cane in this country, and what we do make we make by tearing out the everglades. We are unlikely to increase our production drastically to meet out terrestrial or marine consumption needs any time soon. While sugar cane was the perfect solution for Brazil it does not appear that that will be our ticket.