Hywind, The world's first floating wind farm has been officially opened by First Minister Nicola Sturgeon

Hywind Scotland is a group of five huge wind turbines. Each stands 253 metres tall, 78 metres of which beneath the surface of the North sea, tethered by chains weighing 1,200 tonnes.

According to one of the development partners, the turbines have been built to withstand wind speeds of up to 40 metres per second, and ocean waves 20 metres high

In total the farm is capable of producing of 30megawat…