This sites defines what genetically modified foods are and gives good links to provide more information. It also discusses if GM foods are good or bad for you. Good information.
This article talks about 10 facts about sustainability. How we need to grow our own food because now a days the food is being genetically modified and the government is subsiding with it. My favorite way of sustainability was to eat animal products because "organic" foods in marketplaces may be mono cropped.
It's too early to know which of the aids or ills foreseen for GM foods will materialize. In the meantime, GM technology raises thorny questions of science, ethics, law, and economics that need to be thoroughly debated. This page offers pros/cons for GM foods.