Nature provides us with an inexpensive source of energy, geothermal heat, which is useable as hot water and steam.
Bullfrog Films, Inc., PO Box 149, Oley, PA 19547, Phone: (610)779-8226, Toll-free: 800-543-3764, Fax: (610)370-1978, Email: email@example.com, URL: http://bullfrogfilms.com
Available on VHS
Running time 7 minutes.
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