Wind farm installation
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Timelapse: Installing a wind turbine at sea

15 August 2011 Last updated at 13:01 BST

This week, BBC News is taking an in-depth look at offshore wind turbines, and the challenges, costs and construction of these sea giants.

Here, with the help of some timelapse footage, science correspondent David Shukman shows how a turbine is installed over a day and night at sea.

Three steps to build a wind farm