On May 4, 2007, an EF-5 tornado destroyed 95% of the small town of Greensburg in Kiowa County, Kansas, killing 10 people and injuring over 60 others. But today, the town has rebuilt with a major difference — 100% of its electricity comes from wind energy and many of its roofs are lined with solar panels. In the past 10 years, the average cost of electricity in Greensburg has risen just once, and only by half a penny. “It sounded like there was a helicopter inside the house, just ripping everythi