Wind: Advantages- No fuel and little maintenance required. Provide 'free' energy when the wind is blowing. Can be built offshore.
Disadvantages- Many turbines needed to produce lots of electricity. This causes noise&visual pollution. Not very reliable. High building cost
Tidal: Advantages: No fuel required, 'free' energy, It is reliable. Can meet demands for electricity.
Disadvantages: Can be unsightly, high building cost, can destory habitats.
Hydroelectric: Advantages-Fast start up time, reliable, produces large amounts of electricity. Water can be pumped back to the resevoir when demand is low.
Disadvantages-Floods farmlands, Destroys habitats. Adequate rainfall in the region of the resevoir is needed.
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