Oceans cover 70 per cent of the Earth's surface - their movement generates huge amounts of energy. For centuries, scientists have dreamed of harnessing that motion, but it is only recently that a fuller understanding of wave and tidal dynamics, coupled with improvements in technology, have made wave power a feasible proposition. Quentin Cooper talks to Professor
Stephen Salterfrom Edinburgh University and Dr William Be attie from Queen's University, Belfast about the future for wave power. Will it ever be able to provide sufficiently large amounts of energyto make it economically viable? Producer John Watkins. E-MAIL: scirad@bbc.ac.uk
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