Wind+Energy+-+Veera

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Wind power is a renewable way of converting wind energy into a more useful form of energy, such as electricity. This is done by using wind turbines. The wind spins a turbine (which is generally shaped like a propeller) and the turbine drives an alternator to generate electricity. The stronger the wind blows, the more electricity is generated. The wind turbine can be used to produce electricity for a single building or house, or it can be connected to a electricity grid for more widespread distribution.

 A good example of a country which uses a lot of wind power is Denmark. A 20% of its electricity is, in fact, produced by wind turbines (the highest percentage in any country in the world). Denmark was one of the first countries, back in 1970, to start using wind power commercially, after concerns over global warming started growing. It has made a pledge to eventually produce half of it's electricity by wind power. The table below shows the installed wind capacity share in the electricity supply in Denmark by year:
 * ~ Year || 2001 || 2002 || 2003 || 2004 || 2005 || 2006 || 2007 ||
 * ~ Installed wind capacity (MW) || 2,489 || 2,892 || 3,117 || 3,125 || 3,129 || 3,136 || 3,125 ||
 * ~ Wind power share in the electricity supply (%) || 12.1 || 13.8 || 15.8 || 18.5 || 18.5 || 16.8 || 19.7 ||

Since wind speed is never constant, and there are many different sized wind turbines, it is hard to say exactly how much electricity a wind turbine produces in a day. Basically, the taller and bigger it is, the more energy it will produce.

Producing energy by wind power is very environmentally friendly. Some advantages of it are: they don't leave any residue once removed, they don't produce any pollution, they are quite effective in producing energy, and they don't take up a lot of land, so it is possible to build a lot of them in a small space. Although there are a lot of advantages, there are also some disadvantages such as: some people have complained about them being noisy, they are very expensive to make, and they require a lot of machinery and skilled workers for the installation.