geo-, ge- +
(Greek: earth, land, soil; world; Gaia (Greek), Gaea (Latin), "earth goddess")
A geosynchronous satellite has an orbit similar to a geostationary one, except that it does not necessarily lie in the earth's equatorial plane.
2. Taxis or movements of an animal in response to gravitational forces.
3. A directed response of a motile (moving) organism towards (positive) or away from (negative) the direction of gravity; in other words, a movement of a motile micro-organism or cell in response to the force of gravity.
2. The application of scientific methods and engineering principles to civil engineering problems through acquiring, interpreting, and using knowledge of materials of the crust of the earth.
3. Research that leads to increasing the habitability of the earth.
2. Relating to the form, arrangement, and structure of rock masses of the earth's crust resulting from folding or faulting.
2. Describing an energy system that makes use of the internal heat produced by the earth.
You may see more information about geothermal drilling here.
2. Heat which is produced mainly by the decay of naturally occurring radioactive isotopes of thorium, potassium, and uranium in the earth's core.
3. An energy produced by tapping the earth's internal heat. At present, the only available technologies to do this are those that extract heat from hydrothermal convection systems, where water or steam transfer the heat from the deeper part of the earth to the areas where the energy can be tapped.
The amount of pollutants found in geothermal vary from area to area but may contain arsenic, boron, selenium, lead, cadmium, and fluorides. They also may contain hydrogen sulphide, mercury, ammonia, radon, carbon dioxide, and methane.
Getting the Earth's Heat
Geothermal power plants, which tap hot subterranean water or steam, are high on the lists of at least thirty states in the U.S. which are requiring utility companies to generate some portion of their electricity from such renewable sources.
Most utilities have not pursued geothermal energy primarily because up-front costs, including exploratory drilling, can be expensive since geothermal taps deep reservoirs, not groundwater, which collects much closer to the surface.
An extensive study recently released by the Massachusetts Institute of Technology has shown that the heat available under ground is surprisingly plentiful nationwide.
More information about special Geothermal Energy sources.