The world's largest tidal turbine, weighing 1,000 tonnes, has been installed in Northern Ireland's Strangford Lough.

It is the first commercial tidal turbine, which will generate enough energy to power a thousand local homes. The turbine will begin operations later this year. It will be positioned 400 metres off the shoreline in Strangford Lough, known for its fast tidal current. Its twin rotors measuring about 16 metres in diameter will operate for 18-20 hours a day to produce enough clean, green electricity for the local town.