Concerns about the risks of altered genes migrating into non-crop plants and the risks of pests, such as insects and viruses, developing a resistance to genetically modified plant pesticides are of critical concern to people opposed to genetic engineering. Yet, with more than 67 million acres of transgenic crops in the world today, just 25 years after the discovery of gene splicing technology, we cannot turn back the clock. If anything, the demand for genetically modified food and fiber crops is accelerating..