1. Energy Sources Before Industrialization
Burning Firewood – for heating
and lighting
Hydro power – for transport, for mills
Wind power – ships, mills, water
pumping
Solar power – heating, drying,
lighting
These energy sources are not polluting
the environment, except in the case of
burning firewood. They are available
naturally, free of charge.
Solar, Wind and Hydro are all due to
the energy of sun.
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2. Energy Sources After Industrialization
In the 18th century, people in the
western countries have realised the
advantages of coal. Coal was a
highly-concentrated energy source
than RES and was available in
plenty.
The industrial revolution in 18th and
19th century was fuelled by coal.
Electric power generating stations
based on burning coal appeared in
latter half the 19th century.
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