Supplements as generally understood include vitamins, minerals, fiber, fatty acids, or amino acids, among other substances. U.S. authorities define dietary supplements as foods, while elsewhere they may be classified as drugs or other products. There are more than 50,000 dietary supplements available. More than half of the U.S. adult population (53% - 55%) consume dietary supplements with most common ones being multivitamins.
Wind power capacity has expanded to 369,553 MW by December 2014, and total wind energy production is growing rapidly and has reached around 4% of worldwide electricity usage.
The blades are connected to a rotor that is connected to a main shaft. When the wind blows, the blades turn all the connected items, producing electricity via the generator. Wind energy is delivered to the power grid just like coal, nuclear or solar energy and can be used wherever electricity is used. Because wind is generated due to uneven heating in the earthâs atmosphere, wind energy can be considered a form of solar energy.