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The Impact of Genetically Engineered Crops on Farm Sustainability in the United States Steven J. Adams Kelsen y su teoría unaThe Impact of Genetically Engineered Crops on Farm Sustainability in the United States Since genetically engineered (GE) crops were introduced in 1996, their use in the United States has grown rapidly, accounting for 80 90 percent of soybean, corn, and cotton acreage in 2009. To date, crops with traits that provide resistance to some herbicides and to specific insect pests have benefited adopting farmers by reducing crop losses to insect damage, by