Sources

Ristinen, Robert. Kraushaar, Jack. Energy and the Environment 2nd ed. Universit of Colorado Boulder. 2006

Geothermal Energy. Ed. Erin Heidtke and students of Geography 378 (International Environmental Problems & Policy). University of  Wisconsin-Eau Clair, USA. Spring 2003. <http://academic.evergreen.edu/g/grossmaz/heidtken.html>

United States.
PG&E News Department. PG&E Seeks Approval for New Geothermal Energy Contract. 15 Feb. 2008.
<http://uk.reuters.com/article/pressRelease/idUS215675+15-Feb-2008+PRN20080215?symbol=PCG.N>

Geothermal Energy -- Energy from the Earth's Core. Energy Kids Page. Energy Information Administration.  July 2007. <http://www.eia.doe.gov/kids/energyfacts/sources/renewable/geothermal.html>

Office of Geothermal Technologies. U.S. Department of Energy. Geothermal Heat Pumps Make Sense for Homeowners. April 1999. <http://www1.eere.energy.gov/geothermal/pdfs/26161b.pdf>

SchoolNet Greassroots Program. Iceland Adventure Website. Ed. Corbin, M. 2006. <http://iceland.ednet.ns.ca/schedule.htm>

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