Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Wind power is a natural and renewable energy source, used since ancient times for a range of social necessities pursuing the improvement of life quality and conditions. Issued from the conversion of wind energy, the wind power is described in the context of the rising energy prices, as one of the most useful renewable energy sources, with an increasing demand and supply worldwide. According to wind energy researches, the wind power will reach a potential contribution of 8 % by 2018 within the global electricity system. Learn more about the wind power, its history, social and environmental impact in this book.