Genetically Engineered Mustard Plant

NPR's Dan Charles reports on new scientific findings that reenforce concerns about the unintended consequences of genetic engineering. Researchers at the University of Chicago conclude that a type of genetically engineered mustard plant is 20 times more likely to reproduce than a plant that results from natural mutation. The genetically engineered plant is immune from certain herbicides, and scientists are worried that such a trait could unintentionally be passed to weeds. (4:02) [The new report is published in today's issue of the journal, `Nature.']

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