![](http://www.telegraph.co.uk/earth/graphics/2008/05/27/eatidal127.jpg)
It came when a single turbine on the Atlantic seabed off Orkney was connected to the National Grid on Monday morning. The area off the north of Scotland is regarded as potentially one of the best in the world for tidal power and has been described as the "Saudi Arabia of marine energy".
Although only a small amount of electricity was initially generated as part of a trial, output will be stepped up over the next few weeks to provide enough power for around 150 homes. More >>>