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What are the limitations of extracting energy from (a) the wind? (b) waves? (c) tides?

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What are the limitations of extracting energy from

(a) the wind?

(b) waves?

(c) tides?

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(a) 1. Wind energy cannot be harnessed at places where wind does not blow regularly.

2. The cost of construction of wind energy farms is high because they need & large area to set up.

3. As air is sometimes still and the other times there are storms, so wind is not a dependable source of energy.

(b) 1. The power output is of variable nature.

2. The cost of manufacturing with modem available technologies is high.

3. Wave energy structures can affect marine animals.

(c) 1. The power output is of variable nature because of variation in tide range.

2. It is difficult to construct barrage in areas of high tidal flow.

3. The production of power is not very large. It is irregular.

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