We often hear about solar cars , solar heating , and
solar batteries . but will solar energy ever
be a major source of energy for
society ?
Solar energy is cheaper
than other fossil fuels because
we can get an abundant source from the sun . in sunny desert areas, 50 % of the
sun’s radiatiation that reaches the ground could be used to produce electricity
for businesses and industry and provide heat, light and hot water for homes.
Experimental solar ponds can also produce hot water to drive generators.
Unfortunately, we can’t yet power our homes entirely on
sunlight. Solar energy can only be used effectively in bright light. Its
greatest potential therefore is in hot countries that have clear skies for most
of the year. But, unfortunately most houses
are not in the sunniest parts of the world. Moreover, in order to
harness solar power solar cells are needed to convert sunlight directly into
electricity. Solar cells are very cheap to run, but relatively expensive to buy
and many people can’t afford them.
Needless to say, solar energy is an useful and non-pollution
source of energy. Unfortunately, solar cell, the main device to harness the
sun’s energy are still very expensive.
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