Work is to begin on the largest tidal turbine energy project in Europe after the Scottish government approved it.
MeyGen is to install the tidal array in stages in the Pentland Firth, between Orkney and the Scottish mainland.
It will begin with a 9MW demonstration project of up to six turbines, with construction expected to take place on a phased basis until 2020.
When fully operational, the 86MW array could generate enough electricity to power the equivalent of 42,000 homes.
That is the equivalent of 40% of homes in the Highlands, the Scottish government said.
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