All
living things depend
on
solar energy. Solar energy can also be used to generate
electricity and can be stored in batteries. Sunlight is an energy
source that is available in
different amounts every day. Sunlight has been used in various
ways since the start of human history to meet energy needs.
Advanced technologies are
used to bring the power generated from sunlight through small-scale
solar powered collection sites that are currently in use.
Flat
plate collectors use sunlight to heat a
house and its water. Sunlight can also be
caught in photo
voltaic cells. A photo voltaic cell is made of a
thin, small wafer of silicon about two inches each square. Solar powered cars may
become the hit of the
future.
Solar power is good because it doesn't waste
electricity, and energy is available whenever the sun shines.
Solar power helps reduce electric bills. Solar power is free, and
you can
get as much of it as you want.
A drawback to solar power happens at night or on
cloudy days when sunlight isn't available. When there is no sun,
people have to use electricity and other energy sources. These
energies can cause noise pollution and emit many gases.
