At age 14 William Kamkwamba built a windmill to provide power for his family's house in a Malawian village. He used scrap materials and based it on a design from a library book.
William's matter-of-fact explanation of how he realized this amazing project generated a spontaneous burst of applause from TED's academics and business leaders: "I went to library and I read a book titled Using Energy and I get information about windmill and I try, and I made it."
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