| One of the Earth's great renewable energy
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| | the area.
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| sources is actually the energy that can
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| | Tidal fences are also used to generate
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| be found in all the waves of the ocean.
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| | electricity. Vertical axis turbines are
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| Let's look at this further.
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| | mounted on fences. Passing water is
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| If you have ever been to the ocean, you
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| | forced through the turbines. Ideal
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| were probably fascinated by the phenomena
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| | locations for these are channels between
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| of the waves crashing against the
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| | two landmasses. Tidal fences are cheaper
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| shorelines as the tides came in. The
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| | than tidal barrages and cause less of an
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| ocean's tides are the product of
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| | environmental impact on large marine
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| gravitational pull of the sun and the
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| | life.
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| moon, as well as, the Earth's rotation.
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| | Tidal turbines are a new technology used
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| It causes the ocean waters to be raised
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| | for tidal energy. They are similar to
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| and lowered from time to time. The tides
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| | wind turbines and are arranged underwater
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| have cycles of twelve and one half hours,
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| | in rows. They work best in areas with
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| twice per day, and are easily
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| | strong tides. Although they are heavier
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| predictable.
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| | and costlier to build, they also are
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| The use of tidal power is seen as early
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| | capable of capturing more energy. They
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| as the twelfth century where tidal mills
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| | are also the least environmentally
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| used the force of the tides to grind
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| | damaging of all the tidal power
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| grain and corn. The eighteenth century
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| | technologies, since they do not interfere
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| brought competition from windmills and
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| | with migration paths.
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| waterwheels. Tidal mills pretty much
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| | In order for tidal power to work
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| became extinct with the invention of
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| | successfully it requires a tide
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| cheap steam engines. In 1967, France
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| | difference of at least sixteen feet.
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| became the first to be able to put tidal
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| | Unfortunately there are only a few places
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| wave power to work on a large scale to
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| | where this occurs. This means tidal power
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| produce electricity.
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| | plants cannot just be constructed
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| The generation of electricity from tidal
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| | anywhere. There are only a handful of
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| waves is similar to that of hydroelectric
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| | sites on Earth with this type of tidal
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| power generation. Bigger dams, known as
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| | range. At present, France is the only
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| barrages, are built on the bottom of a
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| | country that has been successful in using
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| tidal basin. Gates on the barrage allow
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| | tidal power. It is hoped developments in
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| the tidal basin to fill during incoming
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| | technology, through research, will be
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| high tides. Likewise, the basin will
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| | made to allow better use of this, what is
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| empty through a turbine during the
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| | now, wasted energy. The future of tidal
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| outgoing tide. This would turn an
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| | energy seems hopeful. Tidal power has
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| electric generator for the production of
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| | great potential and hopefully we can make
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| electricity. There are also systems that
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| | better use of it in the future in our
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| generate electricity from incoming and
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| | quest to find a replacement for fossil
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| outgoing tides. This system can have a
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| | fuels.
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| negative effect on plants and animals in
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