Figures only include installation of the wind farm not its manufacture.
15 August 2011
Last updated at 15:45
Three steps to build a wind farm: Towers in the sea
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1.
The docks
The journey begins at the docks, as huge cranes set to work on the wind turbines
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2.
The journey of the sea jack
Introducing the mighty transporter that takes the turbines out to sea
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3.
Building towers in the sea
Find out what it is like to work inside a turbine and see the view from the top
From bottom to top - David Shukman climbs all the way up the inside of the turbine, and finds out what it's like to work offshore.
Starting at the bottom
Science correspondent David Shukman begins his ascent of one of the towering turbines
Inside the turbine
David Shukman describes his exhausting journey to reach the top of the turbine by ladder
The view at the top
Science correspondent David Shukman climbs one of the towering turbines, and describes the spectacular view from the top
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