美国早在1990年就开始实施《有机食品法案》,该法案规定有机食品生产、处置和加工必须使用天然物质,禁止使用人工合成的物质,农药和化肥不得检出。由于当时世界上还没有商业化的转基因作物,该法案没有对转基因进行规定。转基因作物获得商业批准后,美国农业部颁布了《国家有机食品规范》作为《有机食品法案》执行细则的补充,规范要求有机食品的生产、加工、存储、运输整个食品链中均不得感染转基因,并且 As early as 1990, the United States began to implement the Organic Food Act, which stipulates that natural products must be used for the production, disposal and processing of organic food, and the use of synthetic materials must not be allowed. Pesticides and fertilizers may not be detected. Because there was no commercial GMO in the world at the time, the Act did not regulate GMOs. After the commercial approval of genetically modified crops, the USDA has promulgated the “National Organic Food Code” as a supplement to the Implementing Rules of the Organic Food Act, which requires the production, processing, storage and transportation of organic food to be free from transgenes in the whole food chain, and