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EnGererengy

Imagine what will happen once the Earth uses up its reserves of
coal, petroleum, oil and natural gas. How will cars, planes, trains,
and all other vehicles run? How will be cook our food? How will
generators and heavy machinery work? Clearly, we need to
harness and develop the renewable energy sources present in
nature. Read about some sources of renewable energy here.

The Sun has Since
produced energy for billions ancient mes,
of years. Solar energy is the people have tried to harness
energy of the Sun's rays that reach the wind energy to grind crops, to
Earth. It can be changed into thermal (or pump water, and to cut wood at
heat) energy and used to heat homes and sawmills. Even today, windmills are used
water. If can also be photovoltaic cells or to generate electricity in many coun es.
solar power plants.
Find out how a Which country is
solar cooker known as the Land
of Windmills? Find
works.
out how
windmills are
used there.

Biomass energy Tidal
comes form landfill or power refers to form
rubbish dumps. Most of the of renewable energy in which
rubbish that we dump is buried in the dal ac on in the oceans is
ground. As it rots, it generates a gas, converted to electric power. One of the
which can be used ass renewable or ways in which dal power is harnessed
'green' energy. This gas can between high des and low des is by using a
be used to produce type of dam, to block receding water during the
electricity. In many Indian me when the de flows out from the land. At
villages, biomass energy
is used for cooking, low de, water behind
ligh ng, and other the dam is released,
and the water passes
power needs. through a turbine
that generates
60 electricity.