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How many windmills do you need to produce the 70GW the UK currently consumes?
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depends on which technology you go with.......conventional wind farm turbines produce 5 megawatts, so you would need 70GW/5MW.....
though you could go this way....
http://www.inhabitat.com/2007/11/26/...urbine-maglev/
and reduce the number to 70.....
or if you like the more personal touch, you could go with one of these build your own jobs...
......70GW/1.5KW....
but my true favorite is
http://www.popularmechanics.com/tech...y/4224763.html
which can be built out of trash found in Haitian garbage dumps and will replace a kerosene operated lantern in a corrugated tin shack........