This is a picture of an intrument designed to use waves to make energy. It's called and offshore turbine. The benefits of tidal energy are that once you build it, tidal power is free. It produces no greenhouse gases or other waste. It needs no fuel. Some drawbacks of it are that it only provides power for about ten hours a day, when the tide is actually moving in or out. There are few suitable sites for tidal barrages.
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