Intensive Study 5 Thanks to genetic engineering, plants will grow bigger, mature faster, need less fertilizer and resist insects and diseases new materials will permit improvements in products ranging from refrigerators to automobiles; roofs may rarely need repairs stockings and underwear may not wear out during the owner's lifetime5 Thanks to genetic engineering, plants will grow bigger, mature faster, need less fertilizer, and resist insects and diseases. New materials will permit improvements in products ranging from refrigerators to automobiles; roofs may rarely need repairs; stockings and underwear may not wear out during the owner’s lifetime. Intensive Study