renewable energy


Water energy

Like the wind, water can be used to drive turbines directly. There are several ways that water can be used, including waves, tides and falling water in hydroelectric power schemes.


The water in the sea rises and falls because of waves on the surface. Wave machines use the kinetic energy in this movementto drive electricity generators.


Huge amounts of water move in and out of river mouths each day because of the tides. A tidal barrage is a barrier built over a river estuary to make use of the kinetic energy in the moving water. The barrage contains electricity generators, which are driven by the


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