Wind power is the largest emerging clean-energy source on the planet. It is starting to reach significant penetration in an increasing number of markets, representing approximately 20 percent of Denmark’s total electricity generation, 10 percent of Spain’s, and more than 7 percent of Germany’s. In the U.S., Iowa and Minnesota now get approximately 5 percent of their electricity from the wind, New Mexico around 4 percent, and Oregon approximately 3.5 percent. Even more remarkable, wind represented 30 percent of new electricity generating capacity installed in the U.S. in 2007.