Genetically modified organisms (GMOs) are organisms whose genetic material has been altered using genetic engineering techniques. This allows genes from different species to be combined to produce novel traits like pesticide or herbicide resistance. While controversial, GMOs have potential benefits like increased crop yields from greater resistance to pests and diseases, requiring fewer agricultural chemicals. They may also have increased nutritional value by adding vitamins not found naturally in certain crops. GMOs could help ensure an adequate global food supply as the population grows dramatically in coming decades.