After seven consecutive years of growth, the estimated global area of transgenic crops for 2003 was 67700000 ha. Though no undesirable and harmful effects to human health and environment has been observed during the commercial plantation of transgenic crops, the safety issue of transgenic crops is still extensively concerned. For transgenic plants, unanticipated effects may additionally arise from the process of introducing foreign genes or as a result of the effects of environmental factors/genetic backgro...
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