Wind power is growing worldwide as a major source of renewable energy. To meet the demand for alternative energy sources, large numbers of wind power generators are being deployed on wind farms both at land and sea. Home wind power is also growing rapidly as residential wind power generators are becoming increasingly efficient and practical. Do it yourself wind turbines are sprouting up across the country with some very innovative designs. In the US, wind power generation has doubled in the last two years to more than 20 gigawatts, and recently passed Germany as the world leader in wind energy generation. Even with these strides, wind power currently provides less than 2% of the US electricity supply. However, government forecasts optimistically call for wind power to provide 20% of the nation`s electricity by 2030.