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On the Isle of Islay, a 250 kW wave-powered generator produces enough electricity to power 500 homes. It is clean and renewable and uses no fossil fuels. Out to sea, floating on the ocean surface is the Pelamis, an alternative wave-powered generator that also produces electricity. Renewable energy makes the most of what nature has to offer. Scotland produces hydroelectricity and has some large wind farms.

Note: aspects of this programme reflect the time when it was made – Scotland now has numerous windfarms.