Tidal energy device at sea
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Renewables row threatens energy

The Pentland Firth and Orkney Waters marine energy park was launched by the UK government's energy minister, in effect a vote of confidence in the cutting edge research already happening there.

Offshore wind was also boosted with plans for a large new wind farm off the Firth of Forth.

But a series of rows over renewables, one of which seems to have caused serious divisions in the Cabinet, could threaten the whole future of renewable power.

BBC Scotland's Jamie McIvor reports.