A brief introduction to tidal power
Tidal power is a form of hydroelectricity which produces electric current by harnessing the power of the fluctuating tides. Firstly a barrage is set up and electricity is generated when high tide comes in and water flows through a turbine. When low tide arrives, the water trapped behind the barrage is released back through the turbines. Some tidal power stations can produce 320 MW of electricity.
Unfortunately, todal power stations are very expensive to build and often create electricity when it is not needed. Tidal power stations also have environmental problems when fish swim up these estuaries and are killed by the turbines. The barrage also destroys the habitats of many animals.