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Waves form when the wind blows across the surface of the sea.
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There is a great deal of energy stored up in these waves, as anyone who has ever been swimming in choppy water knows.
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Waves have energy, which can be harnessed to make electricity. This is achieved by putting turbines on the sea or by building them on the seashore.
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The UK has more wave energy in its surrounding seas than any other European country - enough, in fact, to satisfy all of our energy needs were it not for the fact that the associated technology is still vastly expensive and far too inefficient to meet our needs.
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Credits: Getty images
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