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.
World Statistics. Nuclear Energy Around the World. As of November 2016, 30 countries worldwide are operating 450 nuclear reactors for electricity generation and 60 new nuclear plants are under construction in 15 countries. Nuclear power plants provided 10.9 percent of the world's electricity production in 2012.