Tidal power turns tides into electricity, and MeyGen plans 61 seabed turbines for up to 400 MW.
Barrages are dam-like structures that hold back water, then release it through turbines to generate electricity.
Tidal lagoons are coastal enclosures that capture tidal water and produce power as the tide changes.
Underwater tidal turbines sit in fast currents and spin like wind turbines, but in water.
Tides are predictable because the Earth, Moon, and Sun move in regular cycles.
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