Beyond the glamour of Hollywood and the romance of the Golden Gate Bridge, there is another California -- and it's home to the greatest garden in the world. The 400-mile-long Central Valley supplies fully one-quarter of the food America eats. Now the region faces huge changes. In the second of a four-part series on the future of the valley, NPR's John McChesney reports on the benefits and pitfalls of pesticide use, and the pressure on farmers to "go organic."
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