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Oil Shale

Geothermal Energy
(Heat from the Earth)

How Thermal Electric Power Plants Work
Fueled by: coal, natural gas, biomass, nuclear or geothermal

Scrubbing Smoke-Stacks by Growing Algae to Produce Bio-Fuel

February 2008: Hydroponics
Growing plants without soil: saves water & space; sustains life!

January 2008: Technology, Economics & Society

Note: There is a wealth of technology information at Wikipedia's portals.