Sources for Illustrations in Geothermal Energy: Drilling Beneath the Surface Podcast

AFP/Getty Images, Anthony Mwaniki, May 12, 2010, taken from ProQuest's eLibrary. Members of the Maasai community blocked the drilling of four geothermal wells in Kenya's Rift Valley region to protest environmental and health damage

AFP/Getty Images, Vincenzo Pinto, taken from ProQuest's eLibrary, November 25, 2009. Steam rises from a pipeline near a geothermal power plant in Larderello, in the Italian region of Toscana

Enteractive, 1995, taken from ProQuest's eLibrary. Tapping the Earth's Natural Energy

Enteractive, Earth Explorer, 1995, taken from ProQuest's eLibrary. Geothermal Power Cutaway

Ethan Goffman, 2007. Photovoltaic array, Solar Decathlon, Washington, DC

Flickr, AdamCohn. Coal Factory: In coal mining territory between Xining and Lanzhou, Qinghai China http://www.flickr.com/photos/adamcohn/4217314587/

Flickr.com, Kecko. Deep Drilling. Three holes, each with a depth of 165 meters will be drilled to operate a thermal heat pump. Lutzenberg, Switzerland, Oct 1, 2008. http://www.flickr.com/photos/kecko/2905395386/

Flickr.com, laverick. Geothermal Heat Pump Runs the heating and cooling for the CNC Software building. http://www.flickr.com/photos/pixie1213/2807945734/

Flickr.com, Lydurs. Geothermal Steam http://www.flickr.com/photos/lydur/4132279118/

Flickr.com, Lydurs. Geothermal borehole house http://www.flickr.com/photos/lydur/2333875782/

Flickr.com, musical photo man. Geothermal cooling towers at Lardello, Tuscany http://www.flickr.com/photos/walhalla/3954264508/

Flickr.com, sarah sosiak. Steam Vents: Iceland makes great use of geothermal energy. Steam brought up from underground is used to heat all of Reykjavík's hot water http://www.flickr.com/photos/secret_canadian/4110525/

Geo-Heat Center, Oregon Institute of Technology. Interactive Geothermal Projects and Resources Map http://geoheat.oit.edu/dusys.htm

Getty Images, Adek Berry, April 22, 2010, taken from ProQuest's eLibrary. Two Indonesian workers of Pertamina Geothermal Energy examine one of its production wells in Kamojang on Indonesia

Getty Images, David McNew, 2006, taken from ProQuest's eLibrary. Geothermal plant at dusk: Study Finds Conditions Ripe For Major Quake Along San Andreas Fault

Getty Images, Jorgen True, 2007, taken from ProQuest's eLibrary. Wind turbines at the Horns Reef wind farm in Denmark, some 20 kms (12 miles) off the port of Esbjerg

Knight-Ridder/Tribune News Service, 2008, taken from ProQuest's eLibrary. Using Geothermal Energy

NASA: Visible Earth image gallery. Iceland, Satellite Photo http://veimages.gsfc.nasa.gov/6605/Iceland.A2004028.1355.250m.jpg

NASA: World Book at NASA. Beneath Earth's solid crust are the mantle, the outer core, and the inner core http://www.nasa.gov/worldbook/earth_worldbook.html

National Energy Education Development Project. Earth's Interior http://www.eia.doe.gov/kids/energy.cfm?page=geothermal_home-basics

National Renewable Energy Laboratory (NREL). The Earth's heat-called geothermal energy-escapes as steam at a hot springs in Nevada http://www.nrel.gov/learning/re_geothermal.html

National Renewable Energy Laboratory (NREL). Hot lava http://www.nrel.gov/geothermal/

National Renewable Energy Laboratory (NREL). Drilling crew performing tests, geothermal demonstration project, Nevada http://www.nrel.gov/geothermal/projects.html

Tennessee Valley Authority. Geothermal Diagram http://www.tva.gov/commercial/geothermal.htm

U.S. Department of Energy, Energy Efficiency and Renewable Energy. Dry steam power plants at The Geysers, California http://www1.eere.energy.gov/geothermal/powerplants.html

U.S. Department of Energy, Energy Efficiency and Renewable Energy. EGS Development Sequence http://www1.eere.energy.gov/geothermal/enhanced_systems.html

U.S. Department of Energy, Energy Efficiency and Renewable Energy. First geothermal power plant, 1904, Lardarello, Italy http://www1.eere.energy.gov/geothermal/history.html

U.S. Department of Energy, Energy Efficiency and Renewable Energy. Geothermal Heat Pumps http://www1.eere.energy.gov/tribalenergy/guide/geothermal_heat_pumps.html

U.S. Department of Energy, Energy Efficiency and Renewable Energy. A geothermal power plant, Salton Sea area, in southeastern California http://www1.eere.energy.gov/geothermal/technologies.html

U.S. Department of Energy, Energy Efficiency and Renewable Energy. The Mammoth geothermal plant, located in the eastern Sierra Nevada mountain range in California, showcases the environmentally friendly nature of geothermal power. Three air-cooled binary units generate a total of 28 MW of electricity, and release essentially no emissions into the atmosphere or land surface http://www1.eere.energy.gov/tribalenergy/guide/geothermal_electricity_production.html

U.S. Department of Energy, Energy Efficiency and Renewable Energy. The three basic types of geothermal plants: Dry Steam, Flash Steam, & Binary http://www1.eere.energy.gov/geothermal/powerplants.html

U.S. Department of Energy, Energy Efficiency and Renewable Energy, David Parsons. With a 750-MW output, The Geysers in California is the largest producer of geothermal electricity in the world http://www1.eere.energy.gov/tribalenergy/guide/geothermal_electricity_production.html

U.S. Energy Information Administration (EIA). Schematic of Earth's Interior http://www.eia.doe.gov/cneaf/solar.renewables/renewable.energy.annual/backgrnd/fig19.htm

U. S. Geological Survey. Inside the Earth, Cutaway views showing the internal structure of the Earth http://pubs.usgs.gov/gip/dynamic/inside.html

Wikipedia, The Free Encyclopedia. Geothermal power station in the Philippines. http://en.wikipedia.org/wiki/Geothermal_power

Wikipedia, The Free Encyclopedia. The Nesjavellir Geothermal Power Plant in Iceland http://en.wikipedia.org/wiki/Geothermal_power

Wikipedia, The Free Encyclopedia. The oldest known pool fed by a hot spring, built in the Qin dynasty in the 3rd century BC. http://en.wikipedia.org/wiki/Geothermal_power

Wikipedia, The Free Encyclopedia. Renegadeviking, Geothermal drill machine in Wisconsin http://en.wikipedia.org/wiki/File:Geothermaldrilling.jpg

Wikipedia, The Free Encyclopedia. This 3 bladed wind turbine is the most common modern design because it minimizes forces related to fatigue http://en.wikipedia.org/wiki/Wind_power