Several large companies have been manufacturing genetically altered seeds in order to improve overall crop production. These genetically altered species are built to resist pests and herbicides, and to have desirable attributes. Proponents say that the new technology will reduce costs and increase productivity, make food more attractive and result in a safer, more abundant and nutritious food supply.
Many consumer advocates say no.
One type of genetically engineered corn that generates its own pesticide has been known to poison the soil and kill monarch butterfly larvae and lacewing flies, who, ironically, naturally prey on insect pests. Further, there's no guarantee that the new technology will help the economy. Many of these genetically altered seeds depend on brand name pesticides in order to survive. Further, once sown, these seeds are only good for one planting, making the traditional re-use of seeds by farmers impossible. Consequently, the farmer becomes dependent on the company, going first for the seeds, then for the pesticide and then back for the new seeds again.