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renewable energy, Tidal energy comes from the movement of tides driving…
renewable energy
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wind
Disadvantages
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some local people object to on-shore wind farms, arguing that it spoils the countryside
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Hydroelectric Power
Advantages
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pumped storage can supply energy at peak times and then return water to storage using surplus energy when demand is low
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Energy harnessed from the movement of water through rivers, lakes and dams.
tidal
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Advantages
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tidal barrage can double as a bridge, and help prevent flooding
wave
advantage
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more likely to be small local operations, rather than done on a national scale
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Geothermal
Advantages
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used successfully in some countries, such as New Zealand and Iceland
Disadvantages
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geothermal and volcanic activity might calm down over time, leaving power stations redundant
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Biomass
Advantages
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provides constant, reliable energy
if the crops are replaced, biomass can be a longterm, sustainable energy source
Disadvantages
when burned, it gives off atmospheric pollutants
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if crops are not replanted, biomass is a non-renewable resource
wood
Advantages
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if the trees are replaced, wood burning can be a longterm, sustainable energy source
Disadvantges
when burned, it gives off atmospheric pollutants
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if trees are not replanted, wood is a non-renewable resource
Wood is obtained from felling trees, burned to generate heat and light.
Tidal energy comes from the movement of tides driving turbines. A tidal barrage (a kind of dam) is built across estuaries, forcing water through gaps.
The movement of seawater in and out of a cavity on the shore compresses trapped air, driving a turbine.
In volcanic regions it is possible to use the natural heat of the Earth.
Cold water is pumped under ground and comes out as steam. Steam can be used for heating or to power turbines creating electricity.
Biomass energy is generated from decaying plant or animal waste. It can also be an organic material which is burned to provide energy, eg heat, or electricity.