
A turbine is lowered into place in water in the north of Scotland. The waters around the region of John O'Groats, at the nothernmost tip of the United Kingdom, produce powerful tidal surges twice a day.

The UK has few naturally occurring resources for renewable energy, but one source - underwater tidal power - is shaping up as an industry leader. In Scotland, one company estimates that current leases could produce 1.2GW of power: equivalent to two nuclear power plants.

The company that is running the demonstration array of four turbines, Meygen, said the logistics infrastructure in Scotland for this type of renewable energy was excellent and that the region could soon benefit from a bonanza in tidal power.

The waters around Pentland Firth produce some of the world's most powerful tides and waters can run as fast 18mph. With water 832 times denser than air, investors say that more turbines can be run on less space. The power source also has the advantage of being invisible.

Traditional wind turbines are considered by many to be detrimental to the aesthetics of the environment.


