(a) "Promotion of energy conservation is important plank of sustainable energy." Explain the statement with examples.

(i) Judicious use of limited energy resources.

(ii) For example, as concerned citizens we can do our bit by using public transport systems instead of individual vehicles.

(iii)Switching off electricity when not in use.

(iv) Using power saving devices.

(v) Using non-conventional sources of energy.

(b)Energy is required for all kinds of activities. Explain the statement with examples.

(i) Energy is a basic requirement for economic development as it is needed for all types of activities.

(ii) In agriculture, energy is required for water pumps, tractor and other harvesting machines. Green revolution further increased need of energy for using modern farming methods.

(iii) No industry can run without energy. With growth of industrial sector the need of energy is rapidly rising all over the country.

(iv) Transport sector has high consumption of energy.

(v) Commercial and domestic sectors of the economy need inputs of energy.