Your Questions About Wind Turbine Generators Wiki

admin answers:

I dont want to copy the entire article from the site—please do visit the link below for full information

A wind turbine is a machine for converting the mechanical energy in wind into electrical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, the machine is usually called a windmill. If the mechanical energy is then converted to electricity, the machine is called a wind generator

http://en.wikipedia.org/wiki/Wind_turbines
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Http://www.howstuffworks.com/search.php
http://windpower.getfast.info/wind_power/?kw=small%20wind%20electricity%20systems,wind%20turbine

admin answers:

It seems no matter how many time this is asked and answered it keeps coming back. Simple logic should tell you that if you look at the head on profile of the blades they describe a circle as they spin and at any given moment the blades occupy a tiny percentage of that circle. There is also the tower that holds the blades up but again they are usually only a few meters wide and the arch of the blades is usually at least 10m above the ground for safety. If you wish to talk about stopping the wind a forest has far more of an effect.
The average wind generator is only ~50-70m high, most wind effect relates to precipitation and cloud movement/formation which occurs well above this height, even the largest wind generator in the world, has by comparison a small blade area and with a metal mesh tower that offer quite small wind resistance. The Troposphere is ~10km high which is a little more than 50 or even 200m.
Http://en.wikipedia.org/wiki/Fuhrl%C3%A4nder_Wind_Turbine_Laasow
At least you didn’t ask if they slow the Earth’s rotation, which believe it or not, has also been asked before a number of times.