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→Useful websites
*geothermal energy[http://en.wikipedia.org/wiki/geothermal energy]
*geothermal energy[http://en.wikipedia.org/wiki/geothermal energy]
==Useful websites==
==Useful websites==
#http://en.wikipedia.org/wiki/Alternative_energy
#en wikipedia alternative sources energy[http://en.wikipedia.org/wiki/Alternative_energy]
#www.renevable energy.com[http://www.renewableenergyworld.com/rea/tech/bioenergy]
#[http://www.benefits-of-recycling.com/alternativefory/msofenerg]
==Reference Books==
==Reference Books==