The great advantage of wind is that it is a free fuel, unlike gas, coal or oil. Britain is also a windy place, making supply relatively secure. GETTY IMAGESFrom The Independent:
Wind farms generate electricity by capturing the kinetic energy of moving air.
The three blades of each turbine turn on a horizontal axis in the wind and the movement of this drive shaft spins an electricity generator, usually via a gearbox, so that power can be fed into the National Grid.
The wind farms being planned for sites off the coast of Britain will include some of the biggest wind generators ever built, with blades up to 60m long. These offshore wind generators will stand in water that is up to 30m deep and will be up to 220m tall from the base of their foundations to the tips of the turbine blades, about 40m taller than the "Gherkin" skyscraper in London.
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