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What are the limitations of energy that can be harnessed from the sea?
The limitations of energy that can be harnessed from the sea are as follows:
1. To obtain electricity from wave energy, very strong waves are required which are not available in the sea all the time.
2. To harness ocean thermal energy efficiently, a temperature difference of 20℃ or more is required between the surface water (hot) and the water at a depth (cold).
3. Tidal energy depends on the relative positions of the earth, the moon and the sun. Also, very few sites are suitable for building tidal dams.
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