For the first time, the USDA has granted preliminary approval for large-scale planting of an engineered food crop that contains human genes.

The rice from California-based "pharming" firm Ventria Bioscience was designed to synthesize a human immune protein. The crop will soon be cultivated on 3,000 acres of land in Kansas, if the USDA finalizes its approval after a public comment period that ends March 30.

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