Geothermal energy: How does it work?

Nov. 18: In Iceland, 80% of the country’s energy comes from renewable sources. TODAY’s Al Roker visits a geothermal power plant to discover why Iceland is ideal for this green energy source. (Today Show)

MSNBC | November 18, 2008

Tags:. .geothermal. .roker. .iceland. .renewable. .ideal