Wind turbines may be used a stand-alone electricity supply (with battery storage) or connected directly to a main power grid. Wind energy is an attractive renewable energy option in regions characterized by windy environments.
India aimed towards having the equivalent of more than 3,000 average-sized turbines working by the end of the 1990s.
California's 16,000 turbines provide enough electricity to power all the homes in a city the size of San Francisco. During the 1990s, wind power capacity in the United States grew by an average of 26% per year, with 35% growth in 1998, making it the fastest growing electricity sector. In 1999 the US Energy Secretary announced plans to increase wind power generation in the US to meet 5% of its electricity needs by 2020. It was reported in 2001 that the second largest wind farm in the world will be constructed on King Mountain in Texas. Over a 20 year life the facility is expected to prevent 20 million tons of carbon dioxide that would be generated by a fossil-fuelled power plant.