Solar energy
Solar energy is radiant light and heat from the sun harnessed using a
range of ever-evolving technologies such as solar heating,
solar photo voltaic, solar thermal energy, solar architecture and artificial photosynthesis.
Solar energy is a
renewable resource. A renewable resource is a resource that is able to be
replaced or replenished, either by the earth's natural processes or by human
action. Solar
energy is available
at varying proportions almost everywhere on earth. It cannot be depleted
unlike the fossil
fuel based energy resources.
Solar energy is a clean energy resource. It does not involve the emission of Green House Gases
(GHGs) that are believed to be responsible for the worsening global warming of
our planet, Earth.
Solar
energy refers primarily to the use of solar
radiation for practical ends. However, all renewable energies, other
than geothermal and tidal,
derive their energy from the sun. Solar technologies are broadly characterized
as either passive or active depending on the way they capture, convert and
distribute sunlight. Active solar techniques use photo voltaic panels, pumps,
and fans to convert sunlight into useful outputs. Passive solar techniques
include selecting materials with favorable thermal properties, designing spaces
that naturally circulate air, and referencing the position of a building to the
Sun. Active solar technologies increase the supply of energy.
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