| Archaeological evidence establishes that
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| | in the USA.
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| the beginning of man's application of
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| | These geothermal energy springs can be
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| geothermal energy in North America came
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| | separated as low temperature (less than
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| about more than ten thousand years ago
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| | 90°C or 194°F), moderate temperature
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| with the settlements of Paleo-Indians at
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| | (90°C - 150°C or 194 - 302°F), and
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| natural geothermal energy springs. The
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| | high temperature (greater than 150°C or
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| natural geothermal energy springs
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| | 302°F). The roles which these resources
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| functioned as a reservoir of geothermal
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| | are given are also regulated by
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| energy for heat and purifying, using
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| | temperature. The highest temperature
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| their minerals as a source of therapeutic
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| | sources are mostly utilized solely for
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| healing.
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| | geothermal energy electricity generation.
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| Although people still soak in shallow
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| | Current U.S. geothermal energy power
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| pools heated from the Earths core,
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| | generation totals roughly 2200 MW or
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| technologists are creating technologies
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| | close to the equivalent of 4 large atomic
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| that will permit us to examine areas more
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| | power plants. Uses for low and moderate
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| than ten miles beneath the Earth's
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| | temperature sources can be separated into
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| surface hunting for geothermal energy.
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| | two classes: direct use and ground-source
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| Currently in the United States Geothermal
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| | heat pumps.
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| Energy accounts for 0.3 percent of power
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| | Direct use, as the name implies, requires
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| though experts predict this could rise to
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| | applying the geothermal energy in the
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| as much as 10% by 2050.
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| | water directly (without a heat pump or
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| Geothermal Energy is heat (thermal)
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| | power plant) for applications such as
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| retrieved from the sub terrain depths of
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| | heating of buildings, industrial works,
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| the land. The thermal energy held in in
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| | greenhouses, aquaculture (farming of
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| the rock of the earth and liquid (that
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| | fish) and holiday resorts. Direct use
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| occupies the cracks and pores inside the
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| | projects more often than not use
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| rock) in the earth's crust.
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| | geothermal energy temperatures between
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| Scientific calculations determine that
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| | 38°C (100°F) to 149°C (300°F).
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| the earth, starting from an entirely
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| | Current U.S. Established capacity of
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| molten state, must have cooled off and
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| | direct use schemes totals 470 MW or
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| become entirely solid several thousand
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| | sufficient enough to heat 40,000
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| years ago without an energy stimulant in
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| | average-sized homes.
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| addition to that of the sun. It is
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| | Ground-source heat pumps utilize the
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| thought that the elemental source of
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| | terra firma or groundwater as a heat
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| geothermal energy is radioactive decay
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| | source in wintertime and a heat sink in
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| occurring deep within the earth
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| | summertime. Utilizing geothermal energy
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| (Burkland, 1973).
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| | temperatures of 4°C (40°F) to 38°C
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| In most areas, this geothermal energy
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| | (100°F), the heat pump, a mechanical
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| reaches the surface in a very diffuse
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| | device which moves geothermal energy from
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| state. However, due to a variety of
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| | one area to another, transposes
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| geological processes, some areas,
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| | geothermal heat energy from the soil to
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| including substantial portions of many
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| | the home in winter and from the house to
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| western states, are underlain by
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| | the soil in summer.
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| relatively shallow geothermal energy.
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| | The current production of geothermal
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| Humans have utilized geothermal energy in
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| | energy resources from all uses currently
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| North America for more than 10,000 years.
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| | sits third amongst renewable energies,
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| Paleo-American Indians used thermal
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| | behind hydroelectricity and biomass, and
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| springs for cooking, and for sanctuary
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| | in front of solar and wind. Despite these
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| and relief. Geothermal energy springs
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| | impressive statistics, the current level
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| were neutral areas where members of
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| | of geothermal energy use pales in
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| fighting nations would bathe collectively
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| | comparison to its potential. The key to
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| in serenity. Native Americans have a
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| | wider geothermal energy use is greater
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| history with every major thermal spring
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| | public awareness and technical support.
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