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eco friendly gifts california Tidal Power

Tidal power has been used in Britain for over a thousand years at the time of the Doomsday book over 5,000 tide powered mills were recorded. Unlike other eco gifts energy sources, which depend on the weather, tidal power is as predictable as the tides themselves. One way to capture tidal energy is to build a barrage across an estuary, storing water behind it as the tide rises and then releasing the stored water through turbines at low tide. Several sites around the UK could be suitable for this type of tidal system, the largest being the Severn Estuary. Another way is to use ‘marine current turbines’, which work like underwater wind turbines, harnessing tidal currents instead of the winds.

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