Download Solar Wind Hydro electric Biomass

 The
sun is the major source of energy for
phenomena on the Earth's surface, including
winds, ocean currents, and waves.
 Solar
electricity can be produced in
photovoltaic cells that can be placed on
rooftops and other sunny places.
A
photovoltaic cell makes energy by changing
solar radiation into electricity.
 The
cost of photo voltaics continues to drop
dramatically, but they are still several times
as expensive as the cheapest electricity.
 The
sun's energy can be used economically
without conversion to electricity. Some uses
are to heat water for home use, and to heat
and light buildings designed to take
advantage of the sun's path through the sky
 Solar
energy does not require the use of
turbines.
 Solar
energy produces less pollution than any
other method of energy production.
 The
biggest problem with solar energy is the
cost of storing the energy.
 Wind
electricity is produced by turbines
which can be grouped together on a "wind
farm."
 Wind
electricity is cost-competitive with
other forms of electricity.
 Only
certain parts of the country such as the
Great Plains states have enough strong,
steady wind for widespread wind power
development.
 The
lack of locations of sufficient winds for
wind turbines is the biggest problem wind
energy.
 Hydroelectricity
is produced by turbines
below dams. The turbines are moved by
moving water.
 Hydroelectricity
is inexpensive.
 Hydroelectricity
is the most
widely used form
of renewable
energy.
 The
best sites for hydroelectricity in the U.S.
have already been dammed, and further
dams would have to displace valuable urban
and farm land.
 New
hydroelectric power plants in the United
States are unlikely to occur because there is
a lack of locations where the construction of
dams is feasible.
 Dams
can cause damage to the environment
by ruining ecosystems for plants and animals
by flooding.
 Biomass
is the energy production that comes
from burning organic material that were
recently harvested.
 Ethanol
is a combustible liquid made from
plants that can be burned to make energy.
 Two
problems with biomass are air pollution
and use of too much land.
 Heating
water from magma intrusions to
make electricity is called Geothermal.
 Geothermal
energy is heat energy that
originates from within Earth and drives the
movement of Earth’s tectonics’ plates.