Rice paddies in the Senegal valley, for example, yield 50 percent more than the global average — and, unlike Asia, this chunk of the tropics has yet to see its green revolution.

比如，塞内加尔河谷的水稻产量比全球平均产量高50%，与亚洲不同，大面积的热带土壤可孕育出绿色作物。

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'Once, he saw a Cuisinart at Macy's that he thought looked incredibly great, ' says Andy Hertzfeld, one of the engineers on the original Mac team and the author of 'Revolution in the Valley: The Insanely Great Story of How the Mac Was Made.

CNN: Why Apple's Steve Jobs is so fascinating

And they have come here from advanced societies as engineers and scientists that fuel the knowledge-based revolution in the Silicon Valley of California, in the Research Triangle of North Carolina, along Route 128 in Massachusetts, in Austin, Texas, and across this great land.

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Then it was left out in the cold, as Silicon Valley created the microchip revolution and just about all the other excitement of the 1980s and 1990s, down to the dot-com binge.

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