The world population till
date is estimated to number 7.13 billion by the United States Census Bureau
(USCB). Global population in the last two millennium has increased in a rapid
and by the end of 2050 it is assumed to be (8-10) billions. There is no doubt
world’s energy needs will be growing much more steeply from now than at any
time since the beginning of industrial revolution.
We need a lot of energy
for light, heat, transport, food and so on in daily life. We can get this
energy by several ways. For example, there is energy from the sun (solar
energy), hydrogen, coal, oil, gas, river/ocean (hydroelectricity), nuclear
energy etc .Although experts argue that nuclear energy as clean source of
energy and does not produce any chemical or solid pollutants, the uranium that
is used in fueling the nuclear plants still remains radioactive and can still
harm the surrounding community affecting the loss of life and human
settlements. The use of oil, coal and gas leads to environmental degradation.
So eco-friendly sources of energy such as solar, hydro- and geothermal are of
great concern.
Solar energy is a
renewable and environmentally friendly source of energy. The modern systems use
a method of sun exposure to generate electricity via semiconductors. Direct
exposure to the sun and its heat generate electrons that are then captured into
the system and translated into electricity. The design can be used for powering
a small to large system that needs to be power.
Solar energy can be
generated in two forms, namely electricity and heat. Solar cells or
“photovoltaic” are used to convert solar radiation into electricity.
Photovoltaic systems release no greenhouse gases into the atmosphere and they
don’t even need direct sunlight to produce energy; they just need daylight so
they can operate even during cloudy and less bright days. Electricity is
generated indirectly from heat from solar energy and using the steam produced
in the process to run power generators. Since no fossil fuels are being burned
to produce heat, the resultant energy to 100% eco-friendly.
In conclusion, Solar
energy is essential for humanity's continued progress. Being eco-friendly solar
energy can help to save our planet from degradation.
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