经过两年审议 ,认定转基因 ( Bt)玉米对人群健康和环境不构成威胁 ,美国环保局去年 1 0月重行批准 5种 Bt玉米可在今后 7年内使用。由于这 5种玉米含有杀害虫的 Bt基因 ,故规定生物工程种子公司必须监测昆虫对 Bt的抗药性的发展。一些公共利益团体反对使用转基因玉米。认为这些 After two years of deliberation, Bt corn was found not to pose a threat to the health and environment of the population. The EPA approved the re-approval of five Bt maize plants in the past 10 months of last year for use within the next seven years. Because these five maize species contain Bt genes that kill pests, it is regulated that bioengineering seed companies must monitor the development of insect resistance to Bt. Some public interest groups oppose the use of GM corn. Think of these