One of the most potentially harmful aspects of genetically-modified crops, or GMOs, are that such crops are often engineered to be resistant to specific herbicides or pesticides. A farmer therefore can spray an herbicide to kill weeds, while the GM crop plant survives. But it means that the plant now has herbicide residues in it. Or it may contain its own built-in pesticide such as Bt toxin, expressed by the plant because the gene for this pest-resistant compound has been spliced into the plant's genetic code. So GMO crops pose a double-whammy: the crop itself with new genetically-programmed components, especially proteins, coupled with an herbicide or pesticide. Glyphosate is the most widely applied herbicide in the world, in part because GM corn and soy have been engineered to be g...
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