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Topic 27: Geothermal Energy a clean, safe, environmentally friendly and sustainable energy source
(http://www.renewableenergyworld.com/rea/tech/geothermal-energy) This is a very clean, environmentally friendly and sustainable energy source. It is the heat from the earth crust. The heart of the earth is about 12000 degrees farenheit. Geothermal systems tap into this inexhaustive though not generally available energy source. Example is Reykjavik the capital of Iceland which islocated near hot springs.
Decayed radioactive subatsnces trapped in the earth crust heats it up and the heat is carried by water and magma to the earth surface which heats springs up. The pressurized steam from superheated water beneath the earth surface is used to generate electricity. It does not require complex and vast structures like in the fossil fuel extraction.
Natural geothermal vents are not widely available. So, artificial vents are driiled to the ground to reach the hot rocks below, and wateris injected into it to produce steam.
-Theoritically inexhaustible energy source
-Does not require complex engineering structures
Not available in many locations