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hydroelectricity. Some of them are Bhakra,
Nangal, Hirakud, Damodar Valley Corporation,
Nagarjuna Sagar, Kosi, Koyna, Rihand and
Narmada Valley.

Non-conventional Sources
With increase in the demand for energy and fast
depletion of conventional energy sources, the
non-conventional sources of energy are gaining
importance. This energy is abundant, renewable,
pollution free and eco-friendaly. It can be more
Hydel Power
easily supplied to rural, urban and remote areas.
In India, a large number of multipurpose river Thus, it is called the ‘energy of the future’.
valley projects have been developed to produce

Wind Energy

Advantages Disadvantages
w Non-polluting w Noise pollution

w Low cost production of electricity once setup w Wind mills costly to setup
w Cheap w Disturbs radio and T.V. reception
w Harmful to birds

Solar Energy Tidal Energy

Advantages Disadvantages Advantages Disadvantages

w Inexhaustible w Expensive w Non-polluting w Destroys wildlife
w Non-polluting w Diffused source, so w Inexhaustible habitat
gets wasted w Difficult to harness

Non Conventional Source of Energy

Nuclear Energy Bio Gas Energy
Advantages Disadvantages Advantages Disadvantages

w Emits large amount w Generates radioactive w Low cost w Causes green house
of energy waste w Easy to operate effect
w Expensive w Makes use of bio
waste

Geothermal Energy
Advantages Disadvantages

w Clean ecofriendly and always available w Located far away from cities and so costly to
transport the electricity

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