In India's rice Belt, 350 million people live without reliable electricity. But they do have lots of rice -- and rice husks discarded from harvest. So University of Virginia business students Chip Ransler and Manoj Sinha recently devised a way to turn husks into biogas. Hundreds of homes now have affordable power. And the ash from generating the gas isn't wasted: It can be used as fertilizer or as a low-cost ingredient for cement.
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