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What are the limitations of the energy that can be obtained from the oceans?
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The forms of energy that can be obtained from the ocean are tidal energy, wave energy, and ocean thermal energy. There are several limitations in order to harness these energies.

  •  Tidal energy depends on the relative positioning of the Earth, moon, and the Sun.
  • High dams are required to be built to convert tidal energy into electricity.
  • Very strong waves are required to obtain electricity from wave energy.
  • To harness ocean thermal energy efficiently, the difference in the temperature of surface water (hot) and the water at depth (cold) must be 20ºC or more.
     
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