Genetically Modified Foods: Breeding Uncertainty

Genetically modified (GM) crops first appeared commercially in the mid-1990s to what seemed a bright and promising future. Resistant to pests and the herbicides used to control weeds, these new crops were so popular with farmers that millions of acres were planted with them by the turn of the millennium. Today, GM crops are grown commercially by 8.25 million farmers on 200 million acres spread throughout 17 countries, reports the International Service for the Acquisition of Agri-Biotech Applications (ISAAA), an international nonprofit that advocates for the technology. The world's top five producers--the United States, Argentina, Canada, Brazil, and China--account for 96% of global GM cultivation; of this, more than half is in the United States.