For the farmer who wants to save for the future, one Indian entrepreneur has developed what is, in effect, a $200 portable bank branch. For the village housewife, a wood-burning stove has been reinvented to make more heat and less smoke for $23. For the slum family struggling to get clean water, there is a $43 water-purification system. For the villager who wants to give his child a cold glass of milk, there is a tiny $70 refrigerator that can run on batteries. And for rural health clinics, whose patients can't spend more than $5 on a visit, there are heart monitors and baby warmers redesigned to cost 10% of what they do elsewhere.
Such inventions represent a fundamental shift in the global order of innovation.
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