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A gene from a jellyfish is placed in a potato plant, making it light up whenever it needs watering. Rice plants are genetically transformed to produce vitamin A, preventing millions of African children from going blind. Other plants are modified to produce plastic or pharmaceuticals . While many see these as wondrous advancements, others fear they could spawn serious new threats to human health, a loss of genetic viability in our most important crop species, and other signficant and perhaps unforeseen problems. In "Harvest of Fear," NOVA and FRONTLINE join forces to explore the growing controversy over genetically modified agriculture.