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The ocean has great potential as a renewable energy source, but the industry struggles with technical challenges, harsh environments, and environmental permitting.
Finnish start-up WaveRoller says it's found a way to capture the kinetic energy beneath the sea's surface--without buoys or other floating devices.
Orecon wants to take oil rigs and churn wave power with them. It won't be easy but more eyes are looking at wave power these days.