What is the source of energy used by geothermal power plants?

Asked by arwen46 12 years ago 6/4/2013 12:45 PM

Last updated by anonymous 12 years ago 6/6/2013 1:02 AM

Answered by Dr. John Carmen 12 years ago 6/6/2013 1:02 AM

Heated rocks is the source of energy used by geothermal power plants.