Question

Why are we looking at alternate sources of energy ?​

Answer 1

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Why are we looking at alternate sources of energy ?

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(i) tidal energy

(ii) wave energy and

(iii) ocean thermal energy

Limitations of Tidal Energy :

(i) There are very few sites around the world which are suitable for building tidal dams.

(ii) The rise and fall of sea-water during high and low tides is not enough to generate electricity on a large scale.

Limitations of wave energy :

The movement of ocean waves is associated with kinetic energy. Such sites in the world are limited where the waves strike the shore lines with sufficient power.

Limitations of ocean thermal energy :

NCERT Solutions for Class 10 Science Chapter 14 Sources of EnergyTo convert ocean thermal energy into electricity, a temperature difference of 20°C (or more) between the surface water of ocean and deeper water is needed for operating OTEC power plants. This involves high cost.

Answer 2

❥Answer ♦

The reason why we are looking at alternate sources of energy is because the fossil fuels are non-renewable sources of energy, i.e. they are not available in large quantities and cannot be replenished. ... Therefore, it is better to switch to alternate source of energy.

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