Covering more than 70% of the Earth's surface, the ocean is the world's largest untapped, renewable energy resource. It produces both mechanical energy from its tides and waves and thermal energy from the sun's heat. As new technologies are developed, ocean resources will be able to meet many of the world's energy needs. Although not yet widely used, tidal power has potential for future electricity generation. Tides arc more predictable than wind energy and solar power.
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