"Explaining how the wind works, what windmills have contributed to the past, and why they offer environmental promise today as a source of clean, renewable energy, this revised and updated edition offers a glimpse into all the current and historical uses for wind power. Featuring new information on wind energy technology and wind farms, new photographs, and 24 wind-related activities--from keeping track of household energy use and conducting science...

"When 14-year-old William Kamkwamba's Malawi village was hit by a drought in 2001, everyone's crops began to fail. His family didn't have enough money for food, let alone school, so William spent his days in the library. He came across a book on windmills and figured out how to build a windmill that could bring electricity to his village. Everyone thought he was crazy but William persevered and managed to create a functioning windmill out of junkyard...

With only a library book as his guide, fourteen-year-old William Kamkwamba builds a windmill in his Malawian village that changes his life forever. Using junk parts and an inexhaustible imagination, he harnesses enough energy to power a generator that saves his family from famine and resuscitates his dying farming community.

Vollis Simpson was a man with a curious mind--always eager to know how things worked and how to fix them. Growing up on a farm in North Carolina, he loved to tinker with machines. And when he served in the Army Air Corps during WWII, Vollis kept right on tinkering. His ingenuity allowed him to build things no one would have thought to create from scraps--a washing machine out of airplane parts and a motorcycle out of a bike. After the war, his passion...