Harnessing the Sea

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The companies exploring the economic potential of the sea, from wave and tidal energy, to undersea mining and the technology of ocean-going robots. Tanya Beckett hears from Kieran O'Brien of Carnegie Wave Energy about the hard task of getting electricity from the waves, and Edwin Lane reports on plans for a world-first tidal energy project in the UK. Shontel Norgate from Nautilus Minerals talks about mining minerals from the seabed, and Gary Gysin tells us how his company, Liquid Robotics, is developing robots to monitor the world's oceans. (Photo: Waves batter the UK coast; Credit: Paul Faith/AFP/Getty Images)